Hvac Repair Near Me: Professional Cooling System Restoration Can Enhance Your Home'S Convenience Rapidly And Efficiently
Common Ac System Issues
Is your air conditioning unit unexpectedly seeming like a far-off thunderstorm? Or maybe the cool breeze has turned into a faint whisper? These are timeless indications that your system needs some major air conditioner repair. Every summer season, countless property owners face problems that freeze their convenience and surge their disappointment.
Here's a quick rundown of the most regular offenders behind an ailing a/c:
- Refrigerant Leaks-- When the coolant escapes, your AC can't chill the air successfully.
- Filthy Filters-- A blocked filter strangles airflow, triggering uneven cooling and greater energy bills.
- Frozen Coils-- Ever seen ice build up on your unit? This often indicates obstructed air flow or low refrigerant levels.
- Thermostat Malfunctions-- Often, the problem isn't the air conditioner but the brain controlling it.
- Electrical Failures-- Faulty electrical wiring or used elements can cause abrupt shutdowns or irregular behavior.
Remember the last scorching day when your air conditioner provided up? It's not simply bothersome; it can turn your home into an oven. However think of a team actioning in quickly, identifying the problem with precision, and restoring your sanctuary's chill in no time. That's the kind of air conditioning system repair work service that changes headaches into relief.
Issue | Symptoms | How Bold City Heating and Air Assists |
---|---|---|
Refrigerant Leak | Warm air, hissing noises | Expert leak detection and exact refilling |
Dirty Filters | Weak airflow, dusty vents | Thorough cleansing and replacement |
Frozen Coils | Ice accumulation, no cooling | System thaw and air flow optimization |
Could a flickering thermostat be the sneaky perpetrator taking your convenience? Or possibly an unseen electrical fault quietly sabotaging your system? Bold City Heating and Air takes on these obstacles head-on, ensuring your air conditioning unit hums smoothly and effectively. - Bold City Heating and Air
Why go for unpredictable cooling when an expert touch can bring consistent, refreshing air back into your life? The science of a/c unit repair isn't almost fixing machines-- it's about bring back peace of mind on the hottest days of the year.
Vital Tools for Detecting and Repairing Air Conditioners
When an air conditioner system sputters or unexpectedly stops cooling, the very first instinct might be to panic. However the genuine secret depend on the precision instruments. Bold City Heating and Air a specialist wields to diagnose the source quickly. Ever question why some specialists seem to fix complicated concerns in a breeze? It's everything about having the right tools-- from the simple to the extremely specialized
Secret Instruments in the Air Conditioner Repair Toolbox
- Manifold Gauge Set: Consider this as the service technician's stethoscope. It determines pressure in the refrigerant lines, exposing leaks or obstructions that invisible to the naked eye.
- Multimeter: Electrical energy flows are challenging; this tool reads voltage, current, and resistance, making sure every electrical part is humming as it should.
- Drip Detector: Finding even the tiniest refrigerant leaks can save a system from early failure. This tool ferrets out unnoticeable gas getting away from seals or coils.
- Fin Comb: Bent fins on the condenser coil can choke airflow. A simple fin comb straightens these blades, restoring effectiveness without replacing parts.
- Vacuum Pump: Before recharging refrigerant, the system typically requires evacuation of air and moisture, an action important for longevity and efficiency.
Why Bold City Heating and Air Excels
Bold City Heating and Air comprehends the delicate dance between these tools and the intricate machinery of your cooling system. They approach every repair with a keen eye and a well-stocked tool kit. It's not practically repairing what's broken; it has to do with preventing future missteps through expert diagnosis and accuracy.
Pro Tips from the Field
- Constantly adjust your manifold assesses before use; a tiny mistake in pressure reading can lead to misdiagnosis.
- Don't overlook the significance of a tidy work environment-- dust and particles can throw off sensitive electrical readings.
- When managing refrigerant, safety is critical. Usage gloves and safety glasses, and ensure correct ventilation.
- Utilize a thermal imaging electronic camera to find hotspots or cold spots in wiring and coils that might not be visible otherwise.
Could there be a more interesting mix of science and craft than the tools utilized in a/c repair work? Each tool informs a story, and with Bold City Heating and Air, that story is always among swift, effective services and renewed convenience.
Dissecting the Heart of Your Air Conditioning System
Ever wondered what truly takes place when your a/c repair begins? It's not practically slapping on a new filter or topping off refrigerant. The true art depends on a systematic, careful detailed repair process that Bold City Heating and Air has mastered. They understand that each unit tells a story-- often a whisper of a faulty capacitor, other times a shout from a clogged up condenser coil.
Step 1: Diagnostic Deep Dive
The procedure begins with a comprehensive diagnostic that digs underneath surface signs. Is the unit blowing warm air? Exists an uncommon sound, like a ghost in the machine? Vibrant City professionals utilize innovative tools to determine electrical currents, refrigerant levels, and airflow patterns. This isn't guesswork-- it's accuracy.
Step 2: Pinpointing the Source
When the diagnostic puzzle is total, the true offender emerges (Bold City Heating and Air). Could it be a compressor having a hard time against low refrigerant? Or a thermostat that's lost its marbles? Bold City Heating and Air stands out in determining the specific component triggering the hiccup, preventing unnecessary part replacements
Action 3: Tactical Repair Execution
- Power down the system safely to prevent any shocks or damage.
- Get rid of and inspect the defective part-- whether it's a fan motor, capacitor, or evaporator coil.
- Perform precise repair work or replacements using OEM-equivalent parts.
- Reassemble the unit ensuring all connections are tight and sealed.
Step 4: Extensive Performance Testing
After repair work, the system undergoes a battery of tests. Bold City Heating and Air does not just change it on; they measure temperature level differentials and airflow rates to confirm ideal energy effectiveness. This action warranties your system will not just run-- it'll glide through the sweltering days like a breeze.
Pro Tips from the Trenches
- Check the condenser coil routinely-- dust and particles can turn a cool maker into a sweatbox.
- Listen for humming or clicking noises. These subtle signals often precede bigger failures.
- Watch on your system's cycle duration; uncommonly short or long cycles might mean underlying problems.
Identifying the Silent Stress: Why Preventive Upkeep Matters
Ever observed how an a/c unit can suddenly sputter and sigh, as if gasping for breath in the thick summertime heat? The fact is, a blocked air filter or an overlooked coil can silently stealth their way into your system, causing ineffective cooling and unexpected breakdowns. Bold City Heating and Air acknowledges these subtle whispers of distress before they intensify into full-blown breakdowns, understanding that each skipped tune-up inches your unit better to failure.
Expert Tips to Keep Your AC in Top Forming
- Clean or Replace Filters Monthly: Dust and debris aren't simply annoyances-- they choke air flow and require your compressor to overexert.
- Examine the Refrigerant Levels: Low refrigerant can turn your cooling dreams into a lukewarm headache, sapping energy and straining elements.
- Inspect Electrical Connections: Loose wires or rusty contacts might spark unexpected outages or fire dangers.
- Clear the Condensate Drain: Clogs here invite water damage and mold development, silently weakening your system's health.
Why Regimen Tune-Ups Are a Game-Changer
Think about your air conditioning like a finely tuned instrument. Without routine changes, it falls out of harmony, creating discord in your home's comfort. Bold City Heating and Air dives deep, not just skimming surface areas however meticulously examining every nook-- from the evaporator coils to the blower motor. This proactive position avoids the surprise of system failures during the hottest days, turning prospective disasters into simple footnotes.
Maintenance Task | Frequency | Advantage | |
---|---|---|---|
Filter Cleaning/Replacement | Every 1 month | Enhances air quality & & efficiency Refrigerant Level Examine | |
Yearly Avoids compressor pressure Electrical Assessment Every year Ensures security & dependability Condenser | Coil Cleaning Annually Improves | cooling performance Why await a sputtering system to scream for assistance? Resolving these essential points early changes your a/c from | a ticking time bomb into a fortress |
of constant coolness. Bold City Heating and Air doesn't simply repair-- they expect, adjusting their expertise to the special demands your system deals with. Keep in mind, on the planet of ac system repair, foresight is your coolest ally. Specialist Cooling Solutions in Jacksonville, FL Jacksonville, FL, is the largest city by acreage in the contiguous United States and boasts a population that makes it a lively urban center in
Northeast Florida. Understood for its extensive park system,
gorgeous Atlantic beaches, and a busy riverfront, Jacksonville offers an unique blend of metropolitan and outside lifestyle. The city is also a hub for commerce, culture, and sports, hosting several expert sports teams and numerous cultural celebrations throughout the year. If you require assistance with air conditioning system repair, they encourage you to connect to Bold City Heating and Air for a complimentary assessment and professional recommendations customized to your cooling needs.
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- Timuquana: Timuquana is a residential neighborhood located in Jacksonville, Florida, known for its peaceful streets and local parks. It offers a mix of single-family homes and close proximity to nearby amenities and schools.
- San Jose Forest: San Jose Forest is a residential neighborhood located in Jacksonville, Florida, known for its lush greenery and family-friendly atmosphere. The area features a combination of detached houses and local parks, offering a quiet suburban environment.
- E-Town: E-Town is a vibrant neighborhood located in Jacksonville, Florida, known for its multicultural community and historical significance. It features a combination of residential areas, local businesses, and cultural landmarks that add to its unique character.
- Cummer Museum of Art and Gardens: This Cummer Museum of Art and Gardens showcases a wide collection of art representing various eras and cultures. Visitors can also explore lovely formal gardens that look out over the St. Johns River in Jacksonville FL.
- Jacksonville Zoo and Gardens: Jacksonville Zoo and Gardens showcases a varied range of animals and plants from around the world. It provides engaging displays, instructive programs, and preservation initiatives for guests of all years. Jacksonville FL
- Museum of Science and History: The Museum of Science & History in Jacksonville FL showcases interactive exhibits and a planetarium appropriate for all ages. Guests can discover science, history, and culture through engaging displays and informative programs.
- Kingsley Plantation: Kingsley Plantation is a historic site that provides a peek into Florida plantation history, encompassing the lives of enslaved people and the planter family. Visitors can explore the grounds, including the slave quarters, plantation house, and barn. Jacksonville FL
- Fort Caroline National Memorial: Fort Caroline National Memorial celebrates the 16th-century French try to create a colony in Florida. It provides displays and paths exploring the history and natural environment of the area in Jacksonville FL.
- Timucuan Ecological and Historic Preserve: Timucuan Ecological and Historic Preserve protects one of the remaining unspoiled coastal marshes on the Atlantic Coast. It preserves the history of the Timucuan Indians, European explorers, and plantation owners.
- Friendship Fountain: Friendship Fountain is a huge, famous water fountain in Jacksonville FL. It displays impressive water features and lights, making it a favorite attraction and gathering place.
- Riverside Arts Market: Riverside Arts Market in Jacksonville FL, is a vibrant week-to-week arts and crafts market under the Fuller Warren Bridge. It showcases local artisans, on-stage music, food vendors, and a beautiful scene of the St. Johns River.
- San Marco Square: San Marco Square is a lovely shopping and eating area with a European-style atmosphere. It is renowned for its exclusive shops, eateries, and the famous fountain featuring lions. Jacksonville FL
- St Johns Town Center: St. Johns Town Center is an exclusive open-air shopping mall in Jacksonville FL, offering a blend of luxury retailers, well-known brands, and eateries. It's a premier destination for shopping, eating, and entertainment in North East Florida.
- Avondale Historic District: Avondale Historic District presents appealing early 20th-century architecture and unique shops. It's a vibrant neighborhood known for its nearby restaurants and historic character. Jacksonville FL
- Treaty Oak Park: Treaty Oak Park is a gorgeous area in Jacksonville FL, home to a massive, centuries-old oak tree. The park offers a tranquil escape with trails and scenic views of the St. Johns River.
- Little Talbot Island State Park: Little Talbot Island State Park in Jacksonville FL offers untouched shores and varied habitats. Guests can enjoy recreation such as hiking, camping, and wildlife viewing in this natural shoreline environment.
- Big Talbot Island State Park: Big Talbot Island State Park in Jacksonville FL, offers breathtaking shoreline scenery and diverse ecosystems for nature lovers. Explore the unique boneyard beach, hike picturesque trails, and watch abundant wildlife in this beautiful wildlife preserve.
- Kathryn Abbey Hanna Park: Kathryn Abbey Hanna Park in Jacksonville FL, offers a beautiful beach, wooded trails, and a 60-acre freshwater lake for leisure. It's a well-known place for camping, surfing, kayaking, and biking.
- Jacksonville Arboretum and Gardens: Jacksonville Arboretum and Gardens offers a beautiful natural escape with varied trails and specialty gardens. Guests can explore a range of plant life and enjoy peaceful outdoor recreation.
- Memorial Park: Memorial Park is a 5.25-acre park that acts as a homage to the more than 1,200 Floridians who gave their lives in World War I. The park features a sculpture, reflecting pool, and gardens, providing a place for remembrance and reflection. Jacksonville FL
- Hemming Park: Hemming Park is Jacksonville FL's oldest park, a historic open square hosting events, markets, and social get-togethers. It offers a green space in the center of downtown with art installations and a vibrant atmosphere.
- Metropolitan Park: Metropolitan Park in Jacksonville FL offers a beautiful waterfront setting for gatherings and recreation. Featuring play areas, a concert venue, and picturesque views, it's a favorite destination for residents and visitors alike.
- Confederate Park: Confederate Park in Jacksonville FL, was initially named to honor rebel soldiers and sailors. It has since been redesignated and repurposed as a place for local events and recreation.
- Beaches Museum and History Park: Beaches Museum & History Park protects and shares the unique history of Jacksonville's beaches. Explore exhibits on nearby life-saving, surfing, and early beach communities.
- Atlantic Beach: Atlantic Beach features a charming coastal town with stunning beaches and a peaceful atmosphere. People can enjoy surfing, swimming, and exploring local shops and restaurants near Jacksonville FL.
- Neptune Beach: The city of Neptune Beach gives a typical Florida beach town feeling with its sandy shores and easygoing vibe. Visitors can partake in surfing, swimming, and discovering nearby shops and restaurants near Jacksonville FL.
- Jacksonville Beach: Jacksonville Beach is a lively shoreline city famous because of its sandy beaches and surf scene. It offers a mix of leisure activities, restaurants, and nightlife beside the Atlantic Ocean.
- Huguenot Memorial Park: This park offers a beautiful beachfront spot with options for campgrounds, fishing, and birdwatching. Guests can savor the natural allure of the area with its diverse wildlife and scenic coastal views in Jacksonville FL.
- Castaway Island Preserve: Castaway Island Preserve in Jacksonville FL, provides picturesque trails and walkways through diverse habitats. Guests can relish walks in nature, birdwatching, and discovering the beauty of the shoreline environment.
- Yellow Bluff Fort Historic State Park: Yellow Bluff Fort Historic State Park in Jacksonville FL safeguards the earthen remnants of a Civil War-era Confederate fort. Visitors can discover the historical location and discover regarding its significance through interpretive displays.
- Mandarin Museum & Historical Society: The Mandarin Museum & Historical Society safeguards the history of the Mandarin in Jacksonville FL. Guests can discover displays and relics that display the region's special history.
- Museum of Southern History: The Museum of Southern History exhibits artifacts and exhibits connected to the history and culture of the Southern United States. Guests can delve into a variety of topics, such as the Civil War, slavery, and Southern art and literature. Jacksonville FL
- The Catty Shack Ranch Wildlife Sanctuary: The Catty Shack Ranch Wildlife Sanctuary in Jacksonville FL, offers escorted walking tours to see saved big cats and other exotic animals. It's a not-for-profit organization dedicated to offering a safe, loving, forever home for these animals.
- Air Conditioning Installation: Right setup of cooling systems ensures efficient and pleasant indoor climates. This critical process guarantees best performance and durability of climate control units.
- Air Conditioner: ACs chill indoor spaces by extracting heat and humidity. Proper setup by qualified technicians guarantees efficient operation and optimal climate control.
- Hvac: Hvac systems control temperature and air's condition. They are vital for establishing environmental control answers in structures.
- Thermostat: A Thermostat is the primary component for managing temperature in HVAC systems. It tells the cooling unit to activate and deactivate, keeping the desired indoor environment.
- Refrigerant: Refrigerant is crucial for temperature control systems, absorbing heat to generate cool air. Appropriate management of refrigerants is essential during HVAC setup for effective and safe operation.
- Compressor: This Compressor is a vital heart of the cooling system, pumping refrigerant. This process is essential for efficient temperature control in climate control setups.
- Evaporator Coil: An Evaporator Coil absorbs heat from inside air, cooling it down. This component is critical for efficient climate control system installation in buildings.
- Condenser Coil: This Condenser Coil is an important component in cooling systems, dissipating heat outside. It aids the heat exchange needed for efficient indoor climate management.
- Ductwork: Ductwork is vital for dispersing cooled air throughout a building. Proper duct design and arrangement are essential for successful climate regulation system positioning.
- Ventilation: Efficient Ventilation is essential for suitable airflow and indoor air quality. It plays a critical role in ensuring maximum performance and efficiency of climate control systems.
- Heat Pump: Heat Pumps move heat, offering both heating and cooling. They're essential components in modern climate control system installations, providing energy-efficient temperature regulation.
- Split System: Split systems offer both heating and cooling via an indoor unit connected to an outdoor compressor. They provide a ductless solution for temperature control in specific rooms or areas.
- Central Air Conditioning: Central air conditioning systems cool whole homes from a single, powerful unit. Proper installation of these systems is vital for efficient and effective home chilling.
- Energy Efficiency Ratio: Energy Efficiency Ratio measures cooling effectiveness: a greater Energy Efficiency Ratio indicates improved operation and reduced energy use for climate control systems. Selecting a unit with a good Energy Efficiency Ratio can substantially lower long-term costs when installing a new climate control system.
- Variable Speed Compressor: Variable Speed Compressor adjust refrigeration output to meet need, improving performance and convenience in climate control systems. This precise adjustment lowers power waste and keeps stable temperatures in building environments.
- Compressor Maintenance: Maintaining compressors ensures effective operation and longevity in cooling systems. Neglecting it can lead to expensive repairs or system failures when setting up climate control.
- Air Filter: Air Filter trap dirt and debris, making sure of clean air flow within HVAC systems. This enhances system performance and indoor air condition during temperature regulation process.
- Installation Manual: An Installation Manual gives important guidance for properly installing a cooling system. It assures correct steps are used for optimal performance and safety during the unit's setup.
- Electrical Wiring: Electrical Wiring is vital for powering and controlling the parts of climate control systems. Correct wiring ensures secure and efficient functioning of the cooling and heating units.
- Indoor Unit: The Indoor Unit moves treated air inside a room. It's a key part for climate control systems, guaranteeing suitable temperature management in buildings.
- Outdoor Unit: The Outdoor Unit contains the compressor and condenser, dissipating heat externally. It's crucial for a full climate control system installation, ensuring efficient cooling inside.
- Maintenance: Regular upkeep ensures effective performance and lengthens the lifespan of climate control systems. Proper Maintenance prevents breakdowns and improves the performance of installed cooling systems.
- Energy Efficiency: Energy Efficiency is crucial for lowering energy use and expenses when establishing new climate control systems. Prioritizing efficient equipment and correct setup reduces environmental impact and maximizes long-term savings.
- Thermodynamics: Thermodynamics explains how heat moves and transforms energy, vital for cooling system system. Efficient climate control design relies on Thermodynamics principles to maximize energy use during setup placement.
- Building Codes: Construction regulations guarantee suitable and secure HVAC system installation in buildings. They control aspects like energy efficiency and air flow for climate control systems.
- Load Calculation: Load Calculation establishes the heating and chilling demands of a area. It's vital for choosing correctly dimensioned HVAC units for efficient environmental control.
- Mini Split: Mini Split offer a no-duct approach to climate control, providing focused heating and cooling. Their ease of placement makes them appropriate for spaces where adding ductwork for climate modification is impractical.
- Air Handler: The Air Handler moves conditioned air throughout a building. It is a vital component for correct climate control system setup.
- Insulation: Thermal protection is essential for maintaining effective temperature control within a building. It reduces heat exchange, lessening the workload on cooling systems and improving temperature setups.
- Drainage System: Drainage systems eliminate moisture produced by cooling equipment. Proper drainage avoids water damage and guarantees efficient operation of HVAC setups.
- Filter: Filters are vital parts that remove contaminants from the air during the installation of climate control systems. This ensures purer air flow and protects the system's internal components.
- Heating Ventilation And Air Conditioning: Heating Ventilation And Air Conditioning systems regulate inside climate by controlling temperature, humidity, and air condition. Proper installation of these systems guarantees efficient and productive refrigeration and environmental control inside buildings.
- Split System Air Conditioner: Split system air conditioners provide effective cooling and heating by separating the compressor and condenser from the air handler. Their design simplifies the process of setting up climate control in homes and businesses.
- Hvac Technician: Hvac Technicians are trained professionals who specialize in the setup of temperature regulation systems. They make certain of proper functionality and efficiency of these systems for maximum indoor comfort.
- Indoor Air Quality: Indoor Air Quality significantly affects comfort and health, so HVAC system setup should emphasize filtration and ventilation. Appropriate system design and setup is crucial for improving air quality.
- Condensate Drain: The Condensate Drain eliminates water generated throughout the cooling operation, preventing harm and keeping system effectiveness. Proper drain assembly is crucial for successful climate control installation and extended performance.
- Variable Refrigerant Flow: Variable Refrigerant Flow (VRF) systems precisely regulate refrigerant volume to different zones, providing customized cooling and heating. This technology is vital for creating effective and flexible climate control in building setups.
- Building Automation System: Building Automation System coordinate and streamline the operation of HVAC devices. This leads to improved climate control and power savings in buildings.
- Air Conditioning: HVAC systems control indoor temperature and air quality. Proper setup of these systems is crucial for optimized and effective Air Conditioning.
- Temperature Control: Accurate temperature regulation is crucial for efficient climate control system installation. It ensures peak performance and comfort in new cooling systems.
- Thermistor: Thermistors are temperature-sensitive resistors used in climate control systems to accurately measure air temperature. This data helps to regulate system operation, ensuring peak performance and energy efficiency in environmental control setups.
- Thermocouple: Temperature sensors are temperature sensors crucial for guaranteeing proper HVAC system setup. They correctly assess temperature, enabling precise modifications and excellent climate control performance.
- Digital Thermostat: Digital Thermostats precisely regulate temperature, improving HVAC system performance. They are crucial for setting up home climate regulation systems, guaranteeing efficient and pleasant environments.
- Programmable Thermostat: Programmable Thermostats improve climate control systems by allowing customized temperature schedules. This results in enhanced energy savings and comfort in residential AC setups.
- Smart Thermostat: Clever thermostats optimize home temperature management by understanding user desires and changing temperatures automatically. They play a key role in modern HVAC system configurations, enhancing energy savings and comfort.
- Bimetallic Strip: A bimetallic strip, composed of two metals that have different expansion rates, curves in reaction to temperature changes. This characteristic is used in HVAC systems to operate thermostats and regulate heating or cooling processes.
- Capillary Tube Thermostat: A Capillary Tube Thermostat precisely regulates temperature in cooling systems via remote sensing. This component is vital for keeping desired climate control within buildings.
- Thermostatic Expansion Valve: The Thermostatic Expansion Valve regulates refrigerant stream into the evaporator, maintaining ideal cooling. This component is critical for effective operation of refrigeration and climate control systems in buildings.
- Setpoint: Setpoint is the target temperature a climate control system aims to achieve. It guides the system's operation during climate management setups to maintain preferred comfort degrees.
- Temperature Sensor: Temperature sensing devices are essential for controlling warming, ventilation, and cooling systems by monitoring air temperature and assuring effective climate control. Their data aids optimize system performance during climate control installation and maintenance.
- Feedback Loop: The Feedback Loop aids in regulating temperature throughout climate control system setup by continuously monitoring and modifying settings. This ensures peak performance and energy efficiency of installed residential cooling.
- Control System: Control Systems regulate heat, moisture, and airflow in air conditioning setups. They assure peak comfort and energy savings in climate-controlled environments.
- Thermal Equilibrium: Thermal Equilibrium is reached when components attain the same temperature, essential for effective climate control system installation. Proper balance guarantees peak performance and energy conservation in placed cooling systems.
- Thermal Conductivity: Thermal Conductivity dictates how effectively materials transfer heat, affecting the cooling system configuration. Choosing materials with suitable thermal properties guarantees best performance of installed climate control systems.
- Thermal Insulation: Thermal Insulation minimizes heat flow, making sure of efficient cooling by reducing the workload on climate control systems. This enhances energy efficiency and keeps consistent temperatures in buildings.
- On Off Control: On Off Control keeps wanted temperatures by fully activating or turning off cooling systems. This easy method is crucial for regulating environment within buildings throughout environmental control system installation.
- Pid Controller: PID Controllers accurately control temps in HVAC systems. This makes sure effective temperature regulation during facility climate setup and functioning.
- Evaporator: The Evaporator absorbs heat from inside a location, cooling the air. It's a critical component in temperature control systems designed for indoor comfort.
- Condenser: The Condenser unit is a vital component in cooling equipment, rejecting heat removed from the indoor space to the outside environment. Its correct installation is crucial for efficient climate control system location and performance.
- Chlorofluorocarbon: CFCs were previously widely used refrigerants that facilitated cooling in many building systems. Their role has decreased because of environmental concerns about ozone depletion.
- Hydrofluorocarbon: Hydrofluorocarbons are coolants frequently used in cooling systems for buildings and vehicles. Their correct treatment is essential during the setup of climate control systems to avoid environmental harm and guarantee efficient operation.
- Hydrochlorofluorocarbon: HCFCs were once regularly used coolants in climate control systems for buildings. Their phase-out has caused the adoption of more sustainable options for new HVAC setups.
- Global Warming Potential: Global Warming Potential (GWP) indicates how much a certain mass of greenhouse gas contributes to global warming over a set period relative to carbon dioxide. Choosing refrigerants with lower GWP is crucial when setting up climate control systems to lessen environmental impact.
- Ozone Depletion: Ozone Depletion from refrigerants poses environmental risks. Technicians servicing cooling units must adhere to regulations to prevent further damage.
- Phase Change: Phase Change of refrigerants are crucial for efficiently conveying heat in climate control systems. Evaporation and condensation cycles enable cooling by absorbing heat indoors and expelling it outdoors.
- Heat Transfer: Heat Transfer principles are crucial for efficient climate control system establishment. Grasping conduction, convection, and radiation ensures peak system functioning and energy efficiency during the course of establishing home cooling.
- Refrigeration Cycle: The Refrigeration Cycle moves heat, enabling cooling in HVAC systems. Proper setup and maintenance ensure efficient operation and longevity of these refrigeration solutions.
- Environmental Protection Agency: EPA controls refrigerants and establishes standards for HVAC system maintenance to protect the ozone layer and reduce greenhouse gas emissions. Technicians working with refrigeration equipment must be certified to guarantee correct refrigerant management and prevent environmental damage.
- Leak Detection: Leak Detection assures the integrity of refrigerant pipes after climate control system installation. Identifying and fixing leaks is essential for peak function and ecological safety of newly setup climate control systems.
- Pressure Gauge: Pressure Gauge are essential tools for checking refrigerant levels during HVAC system setup. They ensure best performance and prevent damage by verifying pressures are within certain ranges for proper cooling operation.
- Expansion Valve: The Expansion Valve controls refrigerant flow in cooling systems, permitting efficient heat uptake. It is a vital component for peak performance in climate control setups.
- Cooling Capacity: Cooling Capacity decides how effectively a system can reduce the temperature of a space. Choosing the correct capacity is essential for optimal performance in placement of environmental control systems.
- Refrigerant Recovery: Refrigerant Recovery is the procedure of removing and storing refrigerants during HVAC system setups. Correctly recovering refrigerants prevents environmental damage and guarantees effective new cooling equipment installations.
- Refrigerant Recycling: Refrigerant Recycling recovers and reuses refrigerants, reducing environmental effects. This procedure is essential when setting up climate control systems, guaranteeing responsible handling and avoiding ozone depletion.
- Safety Data Sheet: Safety Data Sheets (SDS) give crucial information on the secure handling and potential hazards of chemicals used in cooling system installation. Technicians use SDS data to defend themselves and prevent accidents during HVAC equipment installation and connection.
- Synthetic Refrigerant: Synthetic Refrigerants are essential liquids used in cooling systems to transfer heat. Their proper management is essential for efficient climate control installation and maintenance.
- Heat Exchange: Heat Exchange is vital for chilling buildings, permitting effective temperature control. It's a key process in climate control system configuration, aiding the movement of heat to offer comfortable indoor spaces.
- Cooling Cycle: The Cooling Cycle is the key procedure of heat extraction, utilizing refrigerant to take in and give off heat. This process is vital for effective climate control system setup in buildings.
- Scroll Compressor: Scroll Compressors effectively pressurize refrigerant to power cooling systems. They are a critical component for effective temperature regulation in buildings.
- Reciprocating Compressor: Reciprocating Compressors are vital parts that compress refrigerant in cooling systems. They facilitate heat transfer , enabling effective climate control within structures.
- Centrifugal Compressor: Centrifugal Compressors are vital parts that raise refrigerant stress in large-scale climate control systems. They efficiently move refrigerant, enabling efficient refrigeration and heating across wide areas.
- Rotary Compressor: Rotary Compressor are a vital component in refrigeration systems, using a rotating device to compress refrigerant. Their efficiency and small size make them perfect for climate control setups in different applications.
- Compressor Motor: The Compressor Motor serves as the driving force for the cooling process, circulating refrigerant. It is crucial for proper climate control system installation and operation in buildings.
- Compressor Oil: Compressor Oil lubricates and protects mechanical parts within a systems' compressor, guaranteeing efficient refrigerant pressurization for suitable climate control. It is important to select the correct type of oil during system setup to guarantee longevity and peak function of the cooling appliance.
- Pressure Switch: A Pressure Switch observes refrigerant stages, guaranteeing the system operates safely. It stops damage by shutting down the cooling apparatus if pressure falls beyond the acceptable range.
- Compressor Relay: A Compressor Relay is an electrical device that controls the compressor motor in cooling systems. It ensures the compressor begins and ceases properly, allowing effective temperature control within climate control systems.
- Suction Line: A Suction Line, a vital part in cooling systems, transports refrigerant vapor from the evaporator back the compressor. Appropriate sizing and insulation of this line is key for effective system performance during climate control installation.
- Discharge Line: The Discharge Line transports hot, high-pressure refrigerant gas from the compressor to the condenser. Proper dimensioning and installation of this Discharge Line are critical for ideal cooling system setup.
- Compressor Capacity: Compressor Capacity dictates the cooling power of a system for indoor temperature control. Selecting the right size ensures effective temperature control during climate control installation.
- Cooling Load: Cooling Load is the quantity of heat that must to be removed from a space to maintain a desired temperature. Correct cooling load calculation is important for proper HVAC system installation and sizing.
- Air Conditioning Repair: Air Conditioning Repair ensures systems function perfectly after they are setup. It's crucial for maintaining effective climate control systems put in place.
- Refrigerant Leak: Refrigerant Leaks lessen cooling efficiency and can cause equipment failure. Resolving these leaks is vital for proper climate control system configuration, assuring maximum performance and durability.
- Seer Rating: SEER score represents an HVAC system's refrigeration performance, impacting long-term energy costs. Higher SEER values mean greater energy conservation when setting up climate control.
- Hspf Rating: HSPF rating shows the heating effectiveness of heat pumps. Higher ratings indicate better energy efficiency during climate control installation.
- Preventative Maintenance: Preventative Maintenance guarantees HVAC systems operate effectively and dependably after setup. Routine upkeep reduces failures and extends the lifespan of HVAC setups.
- Airflow: Airflow ensures effective cooling and heating distribution across a building. Suitable Airflow is crucial for optimal performance and comfort in climate control systems.
- Electrical Components: Electrical Components are essential for energizing and controlling systems that govern indoor temperature. They ensure suitable performance, safety, and effectiveness in temperature regulation setups.
- Refrigerant Charging: Refrigerant Charging is the procedure of adding the proper amount of refrigerant to a cooling system. This guarantees best performance and efficiency when setting up climate control units.
- System Diagnosis: System Diagnosis detects possible issues before, during, and following HVAC system installation. It assures optimal performance and averts future problems in climate control systems.
- Hvac System: Hvac System control heat, moisture, and air quality in structures. They are vital for creating climate-control solutions in residential and commercial spaces.
- Ductless Air Conditioning: Ductless Air Conditioning provide focused temperature control lacking large ductwork. They simplify climate control setup in spaces that lack pre-existing duct systems.
- Window Air Conditioner: Window air conditioners are self-contained devices placed in panes to chill individual spaces. They provide a straightforward way for specific temperature regulation within a structure.
- Portable Air Conditioner: Portable AC units offer a versatile temperature-control answer for spaces without central systems. They can also offer temporary temperature regulation during HVAC system configurations.
- System Inspection: System Inspection ensures proper setup of cooling systems by verifying part integrity and adherence to installation standards. This process ensures efficient operation and prevents future malfunctions in climate control systems.
- Coil Cleaning: Coil Cleaning ensures efficient heat transfer, crucial for optimal system performance. This maintenance process is vital for correct setup of climate control systems.
- Refrigerant Recharge: Refrigerant Recharge is essential for restoring chilling ability in air conditioning units. It guarantees peak performance and durability of recently installed environmental regulation units.
- Capacitor: Capacitors provide the necessary energy increase to begin and run motors inside of climate control systems. Their proper function ensures efficient and reliable operation of the cooling unit.
- Contactor: A Contactor serves as an electrical switch that controls power to the outdoor unit's components. It enables the cooling system to turn on when needed.
- Blower Motor: This Blower Motor moves air via the ductwork, enabling efficient heating and cooling distribution within a building. It's a crucial component for indoor climate control systems, assuring consistent temperature and airflow.
- Overheating: Overheating can severely hamper the performance of recently installed climate control systems. Technicians must fix this issue to guarantee efficient and dependable cooling operation.
- Troubleshooting: Fixing identifies and resolves issues that arise during climate control system setup. Sound troubleshooting ensures optimal system performance and stops later issues during building cooling appliance installation.
- Refrigerant Reclaiming: Refrigerant Reclaiming retrieves and reclaims spent refrigerants. This procedure is vital for environmentally responsible HVAC system installation.
- Global Warming: Global Warming increases the demand or for cooling systems, requiring demanding more frequent setups installations. This heightened increased need drives fuels innovation in energy-efficient power-saving climate control solutions options.
- Montreal Protocol: This Montreal Protocol eliminates ozone-depleting substances utilized in cooling systems. This change requires utilizing alternative refrigerants in new environmental control setups.
- Greenhouse Gas: Greenhouse Gas trap heat, impacting the energy efficiency and environmental footprint of climate control system configurations. Choosing refrigerants with reduced global warming potential is crucial for sustainable climate control execution.
- Cfc: Chlorofluorocarbons were once vital refrigerants in cooling systems for buildings and vehicles. Their use has been phased out due to their harmful impact on the ozone layer.
- Hcfc: Hcfc were once typical refrigerants utilized in refrigeration systems for buildings and vehicles. They facilitated the process of setting up climate control systems, but are now being phased out due to their ozone-depleting properties.
- Hfc: HFCs are generally used refrigerants in cooling systems for buildings. Their appropriate handling is critical during the establishment of these systems to lessen environmental impact.
- Refrigerant Oil: Refrigerant oil oils the pump in refrigeration units, ensuring smooth operation and longevity. It's crucial for the proper function of climate control setups.
- Phase-Out: Phase-Out refers to the gradual reduction of specific refrigerants with high global warming capacity. This affects the choice and maintenance of climate control systems in buildings.
- Gwp: GWP indicates a refrigerant's potential to heat the planet if released. Lower GWP refrigerants are progressively preferred in eco-friendly HVAC system configurations.
- Odp: ODP refrigerants damage the ozone layer, influencing regulations for refrigeration system setup. Installers must utilize ozone-friendly alternatives during climate control equipment placement.
- Ashrae: ASHRAE defines standards and guidelines for HVAC system installation. The standards guarantee efficient and secure climate control systems implementation in structures.
- Hvac Systems: Hvac Systems offer temperature and air quality regulation for indoor environments. They are essential for establishing cooling setups in buildings.
- Refrigerant Leaks: Refrigerant Leaks lessen cooling system efficiency and may harm the environment. Suitable procedures during climate control unit setup are vital to avoid these leaks and ensure optimal performance.
- Hvac Repair Costs: Hvac Repair Costs can greatly affect decisions about upgrading to a new climate control system. Unexpected repair costs may encourage homeowners to put money in a full home comfort system for long-term savings.
- Hvac Installation: Hvac Installation includes installing warming, air flow, and cooling systems. It's essential for enabling effective temperature regulation within structures.
- Hvac Maintenance: Hvac Maintenance guarantees effective performance and extends system life. Proper maintenance is vital for seamless climate control system installations.
- Hvac Troubleshooting: Hvac Troubleshooting identifies and resolves issues in heating, ventilation, and cooling systems. It guarantees optimal operation during climate control unit setup and operation.
- Zoning Systems: Zoning Systems divide a building into individual areas for personalized temperature control. This method enhances well-being and energy efficiency during HVAC installation.
- Compressor Types: Various Compressor Types are critical parts for efficient climate control systems. Their choice greatly impacts system effectiveness and performance in environmental comfort uses.
- Compressor Efficiency: Compressor Efficiency is vital, dictating how efficiently the system cools a space for a given energy input. Improving this efficiency directly impacts cooling system installation costs and long-term operational expenses.
- Compressor Overheating: Compressor Overheating can seriously harm the device's core, resulting in system failure. Proper setup guarantees sufficient air flow and refrigerant amounts, avoiding this problem in climate control system installations.
- Compressor Failure: Compressor malfunction stops the cooling process, requiring expert service during climate control system setups. A faulty compressor compromises the entire system's efficiency and lifespan when incorporating it into a building.
- Overload Protector: An Overload Protector protects the compressor motor from overheating during climate control system setup. It stops damage by automatically shutting off power when excessive current or temperature is detected.
- Fan Motor: Fan Motor circulate air through evaporator and condenser coils, a vital process for effective climate control system installation. They aid heat exchange, ensuring peak cooling and heating performance within the designated space.
- Refrigerant Lines: Refrigerant Lines are crucial components that connect the indoor and outside units, circulating refrigerant to help cooling. Their proper proper installation is key for efficient and productive climate control system setup.
- Condensing Unit: A Condensing Unit is the outdoor component in a cooling system. The unit removes heat from the refrigerant, enabling indoor temperature regulation.
- Heat Rejection: Heat Rejection is essential for cooling systems to effectively remove excess heat from a conditioned space. Correct Heat Rejection assures optimal performance and lifespan of climate control setups.
- System Efficiency: System Efficiency is vital for minimizing energy use and operational costs. Optimizing performance during climate control configuration ensures long-term savings and environmental advantages.
- Pressure Drop: Pressure Drop is the decrease in fluid pressure as it flows through a setup, affecting airflow in climate control setups. Properly controlling pressure decrease is vital for optimal performance and effectiveness in climate control systems.
- Subcooling: Subcooling process guarantees optimal equipment performance by cooling the refrigerant under its condensing temperature. This action stops flash gas, increasing refrigeration power and efficiency throughout HVAC equipment setup.
- Superheat: Superheat makes sure that only vapor refrigerant enters the compressor, which prevents damage. It's important to measure superheat during HVAC system installation to optimize cooling capabilities and efficiency.
- Refrigerant Charge: Refrigerant Charge is the quantity of refrigerant in a system, vital for best cooling performance. Proper filling assures efficient heat transfer and avoids damage during climate control setup.
- Corrosion: Rust worsens metallic elements, likely causing leaks and system malfunctions. Protecting against Corrosion is essential for maintaining the effectiveness and lifespan of climate control arrangements.
- Fins: Fins augment the area of coils, boosting heat transfer efficiency. This is essential for optimal performance in environmental control system installations.
- Copper Tubing: Copper piping is vital for refrigerant transfer in air conditioning systems owing to its robustness and efficient heat transfer. Its trustworthy connections assure proper system function during installation of climate units.
- Aluminum Tubing: Aluminum piping is crucial for conveying refrigerant in HVAC systems. Its light and corrosion-resistant properties render them ideal for linking internal and external units in HVAC setups.
- Repair Costs: Unforeseen maintenance can greatly impact the overall expense of setting up a new climate control system. Budgeting for potential Repair Costs ensures a more accurate and comprehensive cost assessment when implementing such a system.
Bold City Heating & Air
4.9(1,687)
Air conditioning repair service·
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8400 Baymeadows Way Suite 1, Jacksonville, FL 32256, United States
Open 24 hours
+1 904-379-1648
6C9C+2H Baymeadows Center, Jacksonville, FL, USA
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From the owner
That Florida sun? It doesn’t play. Prepping your HVAC system now means cool breezes later. Clean filters ✔️ Check refrigerant ✔️ Program thermostats ✔️ 🔥 Be heatwave-ready with Bold City Heating & Air! Book your seasonal check-up and beat the summer rush!
3 days ago
Updates from customers
Randolph and the crew were so nice and they did a AWESOME Job of putting in new ductwork & installation. Great group of guys. RT would answer any questions you had. Felt comfortable with them in my home. From the girl at the front desk to everyone involved Thank You!! I Appreciate you all. I definitely would recommend this company to anyone 😊
a year ago
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Why would an AC heater not be turning on?
An AC heater may not turn on due to power issues like tripped circuit breakers, blown fuses, or loose wiring, thermostat problems such as dead batteries, incorrect settings, or a faulty unit, or safety features engaging due to clogged filte …
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1,687 reviews
"Best price and service I have ever had with an HVAC partner"
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Abe Fernandez
11 reviews · 11 photos
a week ago
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DO NOT HIRE THIS COMPANY. TOOK THEM TO COURT AND WON!
We hired Bold City Heating and Air to replace all our air ducts, and the work they performed was shockingly defective. After the job was done we noticed that … More
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Kenneth Jefferson
5 reviews · 3 photos
2 months ago
Jacob; Ben & Josie were very professional and efficient. If I could give 10 stars I would. Very knowledgeable and they kept me informed throughout the whole process of my complete AC installation. The entire process was easy with Bold City … More
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Response from the owner 2 months ago
Thank you so much for your fantastic 5-star review, Kenneth & Monique! We're thrilled to hear that Jacob, Ben, and Josie provided you with professional and efficient service during your complete AC installation. At Bold City Heating & Air, … More
WILLIAM MOSIER
2 reviews · 4 photos
a month ago
Crew showed up on time got done earlier than expected. Everything was clean. They were quiet. I was able to work throughout the day while they were installing. Couldn’t have been more perfect. Happy with the service.
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Response from the owner a month ago
Thank you so much for your fantastic 5-star review, William! We're thrilled to hear that our team at Bold City Heating & Air made the installation process seamless and respectful of your work day. We appreciate your support and are glad you’re happy with our service! Let us know if you need anything else in the future!
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Jacksonville’s Best HVAC Company
At Bold City Heating & Air, we offer our customers exceptional service when it comes to HVAC in Jacksonville, FL.
From heating and cooling repairs to energy-efficient HVAC installations that save you money, we do it all. When we opened our family-owned business in 2016, we knew we wanted to be the best around and that’s a passion that still stands.
From the moment you call us to the moment we carry out our work, you can depend on us. We believe in clear upfront pricing, no hidden costs, and the highest level of workmanship. With our NATE-certified technicians and Energy Star systems we give you the perfect combination of choice, value, and customer care.
“Experience the Bold Difference” that is Bold City Heating & Air by calling us today!
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When it comes to heating and air services in Jacksonville, we offer all the services you need under one roof. But that’s not where our story ends.
From your HVAC system to your ducts and indoor air quality we offer a complete end-to-end solution. Our team is at the heart of everything we do. Our continuous program of education and training ensures our technicians are the best they can be. It also means our entire team stays up to date with the latest systems and technology. From our Energy Star systems to our whole-house approach, you can depend on every service and product we have to offer.
Our educated and experienced HVAC technicians specialize in a broad range of air conditioning, heating & indoor air quality solutions. We are dedicated to finding the right fit for your home or business. Our broad range of expertise ensures a solution to every challenge.
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When you need an HVAC contractor backed by generations of experience and who truly cares about your satisfaction, turn to Bold City Heating & Air. From air conditioning repairs to the installation of a new energy-efficient heating system, you can depend on our team. We’ll get to you as quickly as we can to solve any problem you might be experiencing.
If you need help with HVAC installation or replacement, we’ll recommend the perfect system and provide you with a competitive quote. We’ll help you to save money on your energy costs going forward and can even help with financing on approved credit.

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We’re proud to offer our high quality HVAC services to the residents of Jacksonville. Contact our team at Bold City Heating & Air today and experience our great service for yourself!

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Website history
Air conditioning
Air conditioning, often abbreviated as A/C (US) or air con (UK),[1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air. Air conditioning can be achieved using a mechanical 'air conditioner' or through other methods, including passive cooling and ventilative cooling.[2][3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC).[4] Heat pumps are similar in many ways to air conditioners but use a reversing valve, allowing them to both heat and cool an enclosed space.[5]
Air conditioners, which typically use vapor-compression refrigeration, range in size from small units used in vehicles or single rooms to massive units that can cool large buildings.[6] Air source heat pumps, which can be used for heating as well as cooling, are becoming increasingly common in cooler climates.
Air conditioners can reduce mortality rates due to higher temperature.[7] According to the International Energy Agency (IEA) 1.6 billion air conditioning units were used globally in 2016.[8] The United Nations called for the technology to be made more sustainable to mitigate climate change and for the use of alternatives, like passive cooling, evaporative cooling, selective shading, windcatchers, and better thermal insulation.
History
[edit]Air conditioning dates back to prehistory.[9] Double-walled living quarters, with a gap between the two walls to encourage air flow, were found in the ancient city of Hamoukar, in modern Syria.[10] Ancient Egyptian buildings also used a wide variety of passive air-conditioning techniques.[11] These became widespread from the Iberian Peninsula through North Africa, the Middle East, and Northern India.[12]
Passive techniques remained widespread until the 20th century when they fell out of fashion and were replaced by powered air conditioning. Using information from engineering studies of traditional buildings, passive techniques are being revived and modified for 21st-century architectural designs.[13][12]

Air conditioners allow the building's indoor environment to remain relatively constant, largely independent of changes in external weather conditions and internal heat loads. They also enable deep plan buildings to be created and have allowed people to live comfortably in hotter parts of the world.[14]
Development
[edit]Preceding discoveries
[edit]In 1558, Giambattista della Porta described a method of chilling ice to temperatures far below its freezing point by mixing it with potassium nitrate (then called "nitre") in his popular science book Natural Magic.[15][16][17] In 1620, Cornelis Drebbel demonstrated "Turning Summer into Winter" for James I of England, chilling part of the Great Hall of Westminster Abbey with an apparatus of troughs and vats.[18] Drebbel's contemporary Francis Bacon, like della Porta a believer in science communication, may not have been present at the demonstration, but in a book published later the same year, he described it as "experiment of artificial freezing" and said that "Nitre (or rather its spirit) is very cold, and hence nitre or salt when added to snow or ice intensifies the cold of the latter, the nitre by adding to its cold, but the salt by supplying activity to the cold of the snow."[15]
In 1758, Benjamin Franklin and John Hadley, a chemistry professor at the University of Cambridge, conducted experiments applying the principle of evaporation as a means to cool an object rapidly. Franklin and Hadley confirmed that the evaporation of highly volatile liquids (such as alcohol and ether) could be used to drive down the temperature of an object past the freezing point of water. They experimented with the bulb of a mercury-in-glass thermometer as their object. They used a bellows to speed up the evaporation. They lowered the temperature of the thermometer bulb down to −14 °C (7 °F) while the ambient temperature was 18 °C (64 °F). Franklin noted that soon after they passed the freezing point of water 0 °C (32 °F), a thin film of ice formed on the surface of the thermometer's bulb and that the ice mass was about 6 mm (1⁄4 in) thick when they stopped the experiment upon reaching −14 °C (7 °F). Franklin concluded: "From this experiment, one may see the possibility of freezing a man to death on a warm summer's day."[19]
The 19th century included many developments in compression technology. In 1820, English scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia could chill air when the liquefied ammonia was allowed to evaporate.[20] In 1842, Florida physician John Gorrie used compressor technology to create ice, which he used to cool air for his patients in his hospital in Apalachicola, Florida. He hoped to eventually use his ice-making machine to regulate the temperature of buildings.[20][21] He envisioned centralized air conditioning that could cool entire cities. Gorrie was granted a patent in 1851,[22] but following the death of his main backer, he was not able to realize his invention.[23] In 1851, James Harrison created the first mechanical ice-making machine in Geelong, Australia, and was granted a patent for an ether vapor-compression refrigeration system in 1855 that produced three tons of ice per day.[24] In 1860, Harrison established a second ice company. He later entered the debate over competing against the American advantage of ice-refrigerated beef sales to the United Kingdom.[24]
First devices
[edit]
Electricity made the development of effective units possible. In 1901, American inventor Willis H. Carrier built what is considered the first modern electrical air conditioning unit.[25][26][27][28] In 1902, he installed his first air-conditioning system, in the Sackett-Wilhelms Lithographing & Publishing Company in Brooklyn, New York.[29] His invention controlled both the temperature and humidity, which helped maintain consistent paper dimensions and ink alignment at the printing plant. Later, together with six other employees, Carrier formed The Carrier Air Conditioning Company of America, a business that in 2020 employed 53,000 people and was valued at $18.6 billion.[30][31]
In 1906, Stuart W. Cramer of Charlotte, North Carolina, was exploring ways to add moisture to the air in his textile mill. Cramer coined the term "air conditioning" in a patent claim which he filed that year, where he suggested that air conditioning was analogous to "water conditioning", then a well-known process for making textiles easier to process.[32] He combined moisture with ventilation to "condition" and change the air in the factories; thus, controlling the humidity that is necessary in textile plants. Willis Carrier adopted the term and incorporated it into the name of his company.[33]
Domestic air conditioning soon took off. In 1914, the first domestic air conditioning was installed in Minneapolis in the home of Charles Gilbert Gates. It is, however, possible that the considerable device (c. 2.1 m × 1.8 m × 6.1 m; 7 ft × 6 ft × 20 ft) was never used, as the house remained uninhabited[20] (Gates had already died in October 1913.)
In 1931, H.H. Schultz and J.Q. Sherman developed what would become the most common type of individual room air conditioner: one designed to sit on a window ledge. The units went on sale in 1932 at US$10,000 to $50,000 (the equivalent of $200,000 to $1,200,000 in 2024.)[20] A year later, the first air conditioning systems for cars were offered for sale.[34] Chrysler Motors introduced the first practical semi-portable air conditioning unit in 1935,[35] and Packard became the first automobile manufacturer to offer an air conditioning unit in its cars in 1939.[36]
Further development
[edit]Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air.[37] The first inverter air conditioners were released in 1980–1981.[38][39]
In 1954, Ned Cole, a 1939 architecture graduate from the University of Texas at Austin, developed the first experimental "suburb" with inbuilt air conditioning in each house. 22 homes were developed on a flat, treeless track in northwest Austin, Texas, and the community was christened the 'Austin Air-Conditioned Village.' The residents were subjected to a year-long study of the effects of air conditioning led by the nation’s premier air conditioning companies, builders, and social scientists. In addition, researchers from UT’s Health Service and Psychology Department studied the effects on the "artificially cooled humans." One of the more amusing discoveries was that each family reported being troubled with scorpions, the leading theory being that scorpions sought cool, shady places. Other reported changes in lifestyle were that mothers baked more, families ate heavier foods, and they were more apt to choose hot drinks.[40][41]
Air conditioner adoption tends to increase above around $10,000 annual household income in warmer areas.[42] Global GDP growth explains around 85% of increased air condition adoption by 2050, while the remaining 15% can be explained by climate change.[42]
As of 2016 an estimated 1.6 billion air conditioning units were used worldwide, with over half of them in China and USA, and a total cooling capacity of 11,675 gigawatts.[8][43] The International Energy Agency predicted in 2018 that the number of air conditioning units would grow to around 4 billion units by 2050 and that the total cooling capacity would grow to around 23,000 GW, with the biggest increases in India and China.[8] Between 1995 and 2004, the proportion of urban households in China with air conditioners increased from 8% to 70%.[44] As of 2015, nearly 100 million homes, or about 87% of US households, had air conditioning systems.[45] In 2019, it was estimated that 90% of new single-family homes constructed in the US included air conditioning (ranging from 99% in the South to 62% in the West).[46][47]
Operation
[edit]Operating principles
[edit]
Cooling in traditional air conditioner systems is accomplished using the vapor-compression cycle, which uses a refrigerant's forced circulation and phase change between gas and liquid to transfer heat.[48][49] The vapor-compression cycle can occur within a unitary, or packaged piece of equipment; or within a chiller that is connected to terminal cooling equipment (such as a fan coil unit in an air handler) on its evaporator side and heat rejection equipment such as a cooling tower on its condenser side. An air source heat pump shares many components with an air conditioning system, but includes a reversing valve, which allows the unit to be used to heat as well as cool a space.[50]
Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space.[51]
Most modern air-conditioning systems feature a dehumidification cycle during which the compressor runs. At the same time, the fan is slowed to reduce the evaporator temperature and condense more water. A dehumidifier uses the same refrigeration cycle but incorporates both the evaporator and the condenser into the same air path; the air first passes over the evaporator coil, where it is cooled[52] and dehumidified before passing over the condenser coil, where it is warmed again before it is released back into the room.[citation needed]
Free cooling can sometimes be selected when the external air is cooler than the internal air. Therefore, the compressor does not need to be used, resulting in high cooling efficiencies for these times. This may also be combined with seasonal thermal energy storage.[53]
Heating
[edit]Some air conditioning systems can reverse the refrigeration cycle and act as an air source heat pump, thus heating instead of cooling the indoor environment. They are also commonly referred to as "reverse cycle air conditioners". The heat pump is significantly more energy-efficient than electric resistance heating, because it moves energy from air or groundwater to the heated space and the heat from purchased electrical energy. When the heat pump is in heating mode, the indoor evaporator coil switches roles and becomes the condenser coil, producing heat. The outdoor condenser unit also switches roles to serve as the evaporator and discharges cold air (colder than the ambient outdoor air).
Most air source heat pumps become less efficient in outdoor temperatures lower than 4 °C or 40 °F.[54] This is partly because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to the condenser coil, to heat up and defrost. Therefore, some heat pump systems will have electric resistance heating in the indoor air path that is activated only in this mode to compensate for the temporary indoor air cooling, which would otherwise be uncomfortable in the winter.
Newer models have improved cold-weather performance, with efficient heating capacity down to −14 °F (−26 °C).[55][54][56] However, there is always a chance that the humidity that condenses on the heat exchanger of the outdoor unit could freeze, even in models that have improved cold-weather performance, requiring a defrosting cycle to be performed.
The icing problem becomes much more severe with lower outdoor temperatures, so heat pumps are sometimes installed in tandem with a more conventional form of heating, such as an electrical heater, a natural gas, heating oil, or wood-burning fireplace or central heating, which is used instead of or in addition to the heat pump during harsher winter temperatures. In this case, the heat pump is used efficiently during milder temperatures, and the system is switched to the conventional heat source when the outdoor temperature is lower.
Performance
[edit]The coefficient of performance (COP) of an air conditioning system is a ratio of useful heating or cooling provided to the work required.[57][58] Higher COPs equate to lower operating costs. The COP usually exceeds 1; however, the exact value is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often graphed or averaged against expected conditions.[59] Air conditioner equipment power in the U.S. is often described in terms of "tons of refrigeration", with each approximately equal to the cooling power of one short ton (2,000 pounds (910 kg) of ice melting in a 24-hour period. The value is equal to 12,000 BTUIT per hour, or 3,517 watts.[60] Residential central air systems are usually from 1 to 5 tons (3.5 to 18 kW) in capacity.[citation needed]
The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment.[61] A similar standard is the European seasonal energy efficiency ratio (ESEER).[citation needed]
Efficiency is strongly affected by the humidity of the air to be cooled. Dehumidifying the air before attempting to cool it can reduce subsequent cooling costs by as much as 90 percent. Thus, reducing dehumidifying costs can materially affect overall air conditioning costs.[62]
Control system
[edit]Wireless remote control
[edit]This type of controller uses an infrared LED to relay commands from a remote control to the air conditioner. The output of the infrared LED (like that of any infrared remote) is invisible to the human eye because its wavelength is beyond the range of visible light (940 nm). This system is commonly used on mini-split air conditioners because it is simple and portable. Some window and ducted central air conditioners uses it as well.
Wired controller
[edit]A wired controller, also called a "wired thermostat," is a device that controls an air conditioner by switching heating or cooling on or off. It uses different sensors to measure temperatures and actuate control operations. Mechanical thermostats commonly use bimetallic strips, converting a temperature change into mechanical displacement, to actuate control of the air conditioner. Electronic thermostats, instead, use a thermistor or other semiconductor sensor, processing temperature change as electronic signals to control the air conditioner.
These controllers are usually used in hotel rooms because they are permanently installed into a wall and hard-wired directly into the air conditioner unit, eliminating the need for batteries.
Types
[edit]Types | Typical Capacity* | Air supply | Mounting | Typical application |
---|---|---|---|---|
Mini-split | small – large | Direct | Wall | Residential |
Window | very small – small | Direct | Window | Residential |
Portable | very small – small | Direct / Ducted | Floor | Residential, remote areas |
Ducted (individual) | small – very large | Ducted | Ceiling | Residential, commercial |
Ducted (central) | medium – very large | Ducted | Ceiling | Residential, commercial |
Ceiling suspended | medium – large | Direct | Ceiling | Commercial |
Cassette | medium – large | Direct / Ducted | Ceiling | Commercial |
Floor standing | medium – large | Direct / Ducted | Floor | Commercial |
Packaged | very large | Direct / Ducted | Floor | Commercial |
Packaged RTU (Rooftop Unit) | very large | Ducted | Rooftop | Commercial |
* where the typical capacity is in kilowatt as follows:
- very small: <1.5 kW
- small: 1.5–3.5 kW
- medium: 4.2–7.1 kW
- large: 7.2–14 kW
- very large: >14 kW
Mini-split and multi-split systems
[edit]
Ductless systems (often mini-split, though there are now ducted mini-split) typically supply conditioned and heated air to a single or a few rooms of a building, without ducts and in a decentralized manner.[63] Multi-zone or multi-split systems are a common application of ductless systems and allow up to eight rooms (zones or locations) to be conditioned independently from each other, each with its indoor unit and simultaneously from a single outdoor unit.
The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.[64][65][66] In 1969, the first mini-split air conditioner was sold in the US.[67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in 1982. Both were first sold in Japan.[68] Variable refrigerant flow systems when compared with central plant cooling from an air handler, eliminate the need for large cool air ducts, air handlers, and chillers; instead cool refrigerant is transported through much smaller pipes to the indoor units in the spaces to be conditioned, thus allowing for less space above dropped ceilings and a lower structural impact, while also allowing for more individual and independent temperature control of spaces. The outdoor and indoor units can be spread across the building.[69] Variable refrigerant flow indoor units can also be turned off individually in unused spaces.[citation needed] The lower start-up power of VRF's DC inverter compressors and their inherent DC power requirements also allow VRF solar-powered heat pumps to be run using DC-providing solar panels.
Ducted central systems
[edit]Split-system central air conditioners consist of two heat exchangers, an outside unit (the condenser) from which heat is rejected to the environment and an internal heat exchanger (the evaporator, or Fan Coil Unit, FCU) with the piped refrigerant being circulated between the two. The FCU is then connected to the spaces to be cooled by ventilation ducts.[70] Floor standing air conditioners are similar to this type of air conditioner but sit within spaces that need cooling.
Central plant cooling
[edit]Large central cooling plants may use intermediate coolant such as chilled water pumped into air handlers or fan coil units near or in the spaces to be cooled which then duct or deliver cold air into the spaces to be conditioned, rather than ducting cold air directly to these spaces from the plant, which is not done due to the low density and heat capacity of air, which would require impractically large ducts. The chilled water is cooled by chillers in the plant, which uses a refrigeration cycle to cool water, often transferring its heat to the atmosphere even in liquid-cooled chillers through the use of cooling towers. Chillers may be air- or liquid-cooled.[71][72]
Portable units
[edit]A portable system has an indoor unit on wheels connected to an outdoor unit via flexible pipes, similar to a permanently fixed installed unit (such as a ductless split air conditioner).
Hose systems, which can be monoblock or air-to-air, are vented to the outside via air ducts. The monoblock type collects the water in a bucket or tray and stops when full. The air-to-air type re-evaporates the water, discharges it through the ducted hose, and can run continuously. Many but not all portable units draw indoor air and expel it outdoors through a single duct, negatively impacting their overall cooling efficiency.
Many portable air conditioners come with heat as well as a dehumidification function.[73]
Window unit and packaged terminal
[edit]
The packaged terminal air conditioner (PTAC), through-the-wall, and window air conditioners are similar. These units are installed on a window frame or on a wall opening. The unit usually has an internal partition separating its indoor and outdoor sides, which contain the unit's condenser and evaporator, respectively. PTAC systems may be adapted to provide heating in cold weather, either directly by using an electric strip, gas, or other heaters, or by reversing the refrigerant flow to heat the interior and draw heat from the exterior air, converting the air conditioner into a heat pump. They may be installed in a wall opening with the help of a special sleeve on the wall and a custom grill that is flush with the wall and window air conditioners can also be installed in a window, but without a custom grill.[74]
Packaged air conditioner
[edit]Packaged air conditioners (also known as self-contained units)[75][76] are central systems that integrate into a single housing all the components of a split central system, and deliver air, possibly through ducts, to the spaces to be cooled. Depending on their construction they may be outdoors or indoors, on roofs (rooftop units),[77][78] draw the air to be conditioned from inside or outside a building and be water or air-cooled. Often, outdoor units are air-cooled while indoor units are liquid-cooled using a cooling tower.[70][79][80][81][82][83]
Types of compressors
[edit]Compressor types | Common applications | Typical capacity | Efficiency | Durability | Repairability |
---|---|---|---|---|---|
Reciprocating | Refrigerator, Walk-in freezer, portable air conditioners | small – large | very low (small capacity) medium (large capacity) | very low | medium |
Rotary vane | Residential mini splits | small | low | low | easy |
Scroll | Commercial and central systems, VRF | medium | medium | medium | easy |
Rotary screw | Commercial chiller | medium – large | medium | medium | hard |
Centrifugal | Commercial chiller | very large | medium | high | hard |
Maglev Centrifugal | Commercial chiller | very large | high | very high | very hard |
Reciprocating
[edit]- Main article: Reciprocating compressor
This compressor consists of a crankcase, crankshaft, piston rod, piston, piston ring, cylinder head and valves. [citation needed]
Scroll
[edit]- Main article: Scroll compressor
This compressor uses two interleaving scrolls to compress the refrigerant.[84] it consists of one fixed and one orbiting scrolls. This type of compressor is more efficient because it has 70 percent less moving parts than a reciprocating compressor. [citation needed]
Screw
[edit]This compressor use two very closely meshing spiral rotors to compress the gas. The gas enters at the suction side and moves through the threads as the screws rotate. The meshing rotors force the gas through the compressor, and the gas exits at the end of the screws. The working area is the inter-lobe volume between the male and female rotors. It is larger at the intake end, and decreases along the length of the rotors until the exhaust port. This change in volume is the compression. [citation needed]
Capacity modulation technologies
[edit]There are several ways to modulate the cooling capacity in refrigeration or air conditioning and heating systems. The most common in air conditioning are: on-off cycling, hot gas bypass, use or not of liquid injection, manifold configurations of multiple compressors, mechanical modulation (also called digital), and inverter technology. [citation needed]
Hot gas bypass
[edit]Hot gas bypass involves injecting a quantity of gas from discharge to the suction side. The compressor will keep operating at the same speed, but due to the bypass, the refrigerant mass flow circulating with the system is reduced, and thus the cooling capacity. This naturally causes the compressor to run uselessly during the periods when the bypass is operating. The turn down capacity varies between 0 and 100%.[85]
Manifold configurations
[edit]Several compressors can be installed in the system to provide the peak cooling capacity. Each compressor can run or not in order to stage the cooling capacity of the unit. The turn down capacity is either 0/33/66 or 100% for a trio configuration and either 0/50 or 100% for a tandem.[citation needed]
Mechanically modulated compressor
[edit]This internal mechanical capacity modulation is based on periodic compression process with a control valve, the two scroll set move apart stopping the compression for a given time period. This method varies refrigerant flow by changing the average time of compression, but not the actual speed of the motor. Despite an excellent turndown ratio – from 10 to 100% of the cooling capacity, mechanically modulated scrolls have high energy consumption as the motor continuously runs.[citation needed]
Variable-speed compressor
[edit]- Main article: Inverter compressor
This system uses a variable-frequency drive (also called an Inverter) to control the speed of the compressor. The refrigerant flow rate is changed by the change in the speed of the compressor. The turn down ratio depends on the system configuration and manufacturer. It modulates from 15 or 25% up to 100% at full capacity with a single inverter from 12 to 100% with a hybrid tandem. This method is the most efficient way to modulate an air conditioner's capacity. It is up to 58% more efficient than a fixed speed system.[citation needed]
Impact
[edit]Health effects
[edit]In hot weather, air conditioning can prevent heat stroke, dehydration due to excessive sweating, electrolyte imbalance, kidney failure, and other issues due to hyperthermia.[8][86] Heat waves are the most lethal type of weather phenomenon in the United States.[87][88] A 2020 study found that areas with lower use of air conditioning correlated with higher rates of heat-related mortality and hospitalizations.[89] The August 2003 France heatwave resulted in approximately 15,000 deaths, where 80% of the victims were over 75 years old. In response, the French government required all retirement homes to have at least one air-conditioned room at 25 °C (77 °F) per floor during heatwaves.[8]
Air conditioning (including filtration, humidification, cooling and disinfection) can be used to provide a clean, safe, hypoallergenic atmosphere in hospital operating rooms and other environments where proper atmosphere is critical to patient safety and well-being. It is sometimes recommended for home use by people with allergies, especially mold.[90][91] However, poorly maintained water cooling towers can promote the growth and spread of microorganisms such as Legionella pneumophila, the infectious agent responsible for Legionnaires' disease. As long as the cooling tower is kept clean (usually by means of a chlorine treatment), these health hazards can be avoided or reduced. The state of New York has codified requirements for registration, maintenance, and testing of cooling towers to protect against Legionella.[92]
Economic effects
[edit]First designed to benefit targeted industries such as the press as well as large factories, the invention quickly spread to public agencies and administrations with studies with claims of increased productivity close to 24% in places equipped with air conditioning.[93]
Air conditioning caused various shifts in demography, notably that of the United States starting from the 1970s. In the US, the birth rate was lower in the spring than during other seasons until the 1970s but this difference then declined since then.[94] As of 2007, the Sun Belt contained 30% of the total US population while it was inhabited by 24% of Americans at the beginning of the 20th century.[95] Moreover, the summer mortality rate in the US, which had been higher in regions subject to a heat wave during the summer, also evened out.[7]
The spread of the use of air conditioning acts as a main driver for the growth of global demand of electricity.[96] According to a 2018 report from the International Energy Agency (IEA), it was revealed that the energy consumption for cooling in the United States, involving 328 million Americans, surpasses the combined energy consumption of 4.4 billion people in Africa, Latin America, the Middle East, and Asia (excluding China).[8] A 2020 survey found that an estimated 88% of all US households use AC, increasing to 93% when solely looking at homes built between 2010 and 2020.[97]
Environmental effects
[edit]
Space cooling including air conditioning accounted globally for 2021 terawatt-hours of energy usage in 2016 with around 99% in the form of electricity, according to a 2018 report on air-conditioning efficiency by the International Energy Agency.[8] The report predicts an increase of electricity usage due to space cooling to around 6200 TWh by 2050,[8][98] and that with the progress currently seen, greenhouse gas emissions attributable to space cooling will double: 1,135 million tons (2016) to 2,070 million tons.[8] There is some push to increase the energy efficiency of air conditioners. United Nations Environment Programme (UNEP) and the IEA found that if air conditioners could be twice as effective as now, 460 billion tons of GHG could be cut over 40 years.[99] The UNEP and IEA also recommended legislation to decrease the use of hydrofluorocarbons, better building insulation, and more sustainable temperature-controlled food supply chains going forward.[99]
Refrigerants have also caused and continue to cause serious environmental issues, including ozone depletion and climate change, as several countries have not yet ratified the Kigali Amendment to reduce the consumption and production of hydrofluorocarbons.[100] CFCs and HCFCs refrigerants such as R-12 and R-22, respectively, used within air conditioners have caused damage to the ozone layer,[101] and hydrofluorocarbon refrigerants such as R-410A and R-404A, which were designed to replace CFCs and HCFCs, are instead exacerbating climate change.[102] Both issues happen due to the venting of refrigerant to the atmosphere, such as during repairs. HFO refrigerants, used in some if not most new equipment, solve both issues with an ozone damage potential (ODP) of zero and a much lower global warming potential (GWP) in the single or double digits vs. the three or four digits of hydrofluorocarbons.[103]
Hydrofluorocarbons would have raised global temperatures by around 0.3–0.5 °C (0.5–0.9 °F) by 2100 without the Kigali Amendment. With the Kigali Amendment, the increase of global temperatures by 2100 due to hydrofluorocarbons is predicted to be around 0.06 °C (0.1 °F).[104]
Alternatives to continual air conditioning include passive cooling, passive solar cooling, natural ventilation, operating shades to reduce solar gain, using trees, architectural shades, windows (and using window coatings) to reduce solar gain.[citation needed]
Social effects
[edit]Socioeconomic groups with a household income below around $10,000 tend to have a low air conditioning adoption,[42] which worsens heat-related mortality.[7] The lack of cooling can be hazardous, as areas with lower use of air conditioning correlate with higher rates of heat-related mortality and hospitalizations.[89] Premature mortality in NYC is projected to grow between 47% and 95% in 30 years, with lower-income and vulnerable populations most at risk.[89] Studies on the correlation between heat-related mortality and hospitalizations and living in low socioeconomic locations can be traced in Phoenix, Arizona,[105] Hong Kong,[106] China,[106] Japan,[107] and Italy.[108][109] Additionally, costs concerning health care can act as another barrier, as the lack of private health insurance during a 2009 heat wave in Australia, was associated with heat-related hospitalization.[109]
Disparities in socioeconomic status and access to air conditioning are connected by some to institutionalized racism, which leads to the association of specific marginalized communities with lower economic status, poorer health, residing in hotter neighborhoods, engaging in physically demanding labor, and experiencing limited access to cooling technologies such as air conditioning.[109] A study overlooking Chicago, Illinois, Detroit, and Michigan found that black households were half as likely to have central air conditioning units when compared to their white counterparts.[110] Especially in cities, Redlining creates heat islands, increasing temperatures in certain parts of the city.[109] This is due to materials heat-absorbing building materials and pavements and lack of vegetation and shade coverage.[111] There have been initiatives that provide cooling solutions to low-income communities, such as public cooling spaces.[8][111]
Other techniques
[edit]Buildings designed with passive air conditioning are generally less expensive to construct and maintain than buildings with conventional HVAC systems with lower energy demands.[112] While tens of air changes per hour, and cooling of tens of degrees, can be achieved with passive methods, site-specific microclimate must be taken into account, complicating building design.[12]
Many techniques can be used to increase comfort and reduce the temperature in buildings. These include evaporative cooling, selective shading, wind, thermal convection, and heat storage.[113]
Passive ventilation
[edit]


Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of pressure differences arising from natural forces.
There are two types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. Wind driven ventilation arises from the different pressures created by wind around a building or structure, and openings being formed on the perimeter which then permit flow through the building. Buoyancy-driven ventilation occurs as a result of the directional buoyancy force that results from temperature differences between the interior and exterior.[114]
Since the internal heat gains which create temperature differences between the interior and exterior are created by natural processes, including the heat from people, and wind effects are variable, naturally ventilated buildings are sometimes called "breathing buildings".Passive cooling
[edit]
Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption.[115][116] This approach works either by preventing heat from entering the interior (heat gain prevention) or by removing heat from the building (natural cooling).[117]
Natural cooling utilizes on-site energy, available from the natural environment, combined with the architectural design of building components (e.g. building envelope), rather than mechanical systems to dissipate heat.[118] Therefore, natural cooling depends not only on the architectural design of the building but on how the site's natural resources are used as heat sinks (i.e. everything that absorbs or dissipates heat). Examples of on-site heat sinks are the upper atmosphere (night sky), the outdoor air (wind), and the earth/soil.
Passive cooling is an important tool for design of buildings for climate change adaptation – reducing dependency on energy-intensive air conditioning in warming environments.[119][120]
Daytime radiative cooling
[edit]
Passive daytime radiative cooling (PDRC) surfaces reflect incoming solar radiation and heat back into outer space through the infrared window for cooling during the daytime. Daytime radiative cooling became possible with the ability to suppress solar heating using photonic structures, which emerged through a study by Raman et al. (2014).[122] PDRCs can come in a variety of forms, including paint coatings and films, that are designed to be high in solar reflectance and thermal emittance.[121][123]
PDRC applications on building roofs and envelopes have demonstrated significant decreases in energy consumption and costs.[123] In suburban single-family residential areas, PDRC application on roofs can potentially lower energy costs by 26% to 46%.[124] PDRCs are predicted to show a market size of ~$27 billion for indoor space cooling by 2025 and have undergone a surge in research and development since the 2010s.[125][126]
Fans
[edit]Hand fans have existed since prehistory. Large human-powered fans built into buildings include the punkah.
The 2nd-century Chinese inventor Ding Huan of the Han dynasty invented a rotary fan for air conditioning, with seven wheels 3 m (10 ft) in diameter and manually powered by prisoners.[127]: 99, 151, 233 In 747, Emperor Xuanzong (r. 712–762) of the Tang dynasty (618–907) had the Cool Hall (Liang Dian 涼殿) built in the imperial palace, which the Tang Yulin describes as having water-powered fan wheels for air conditioning as well as rising jet streams of water from fountains. During the subsequent Song dynasty (960–1279), written sources mentioned the air conditioning rotary fan as even more widely used.[127]: 134, 151
Thermal buffering
[edit]In areas that are cold at night or in winter, heat storage is used. Heat may be stored in earth or masonry; air is drawn past the masonry to heat or cool it.[13]
In areas that are below freezing at night in winter, snow and ice can be collected and stored in ice houses for later use in cooling.[13] This technique is over 3,700 years old in the Middle East.[128] Harvesting outdoor ice during winter and transporting and storing for use in summer was practiced by wealthy Europeans in the early 1600s,[15] and became popular in Europe and the Americas towards the end of the 1600s.[129] This practice was replaced by mechanical compression-cycle icemakers.
Evaporative cooling
[edit]In dry, hot climates, the evaporative cooling effect may be used by placing water at the air intake, such that the draft draws air over water and then into the house. For this reason, it is sometimes said that the fountain, in the architecture of hot, arid climates, is like the fireplace in the architecture of cold climates.[11] Evaporative cooling also makes the air more humid, which can be beneficial in a dry desert climate.[130]
Evaporative coolers tend to feel as if they are not working during times of high humidity, when there is not much dry air with which the coolers can work to make the air as cool as possible for dwelling occupants. Unlike other types of air conditioners, evaporative coolers rely on the outside air to be channeled through cooler pads that cool the air before it reaches the inside of a house through its air duct system; this cooled outside air must be allowed to push the warmer air within the house out through an exhaust opening such as an open door or window.[131]
See also
[edit]- Air filter
- Air purifier
- Cleanroom
- Crankcase heater
- Energy recovery ventilation
- Indoor air quality
- Particulates
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