101 Facts About Heating, Ventilation, and Air Conditioning (HVAC) Systems in 2023

Home / Facts About Heating Ventilation and Air Conditioning (HVAC) Systems / 101 Facts About Heating, Ventilation, and Air Conditioning (HVAC) Systems in 2023

101 Facts About Heating, Ventilation, and Air Conditioning (HVAC) Systems in 2023

Have you ever wanted to learn more about the fascinating world of Heating, Ventilation, and Air Conditioning (HVAC) Systems? Have you been curious about their use in modern buildings and homes or their development over the years? Then this factsheet is perfect for you!


What kind of technology makes up these systems, and what are some of the unique challenges that come with installing them? What are the benefits to using HVAC Systems compared to traditional methods and how is energy efficiency currently being incorporated into them? From good ventilation practices to air purification processes, there is a lot to learn about HVAC Systems. Discover all these answers – plus many more – as we take a look at 101 Facts About Heating, Ventilation, and Air Conditioning (HVAC) Systems.


We know finding facts and figures about Heating, Ventilation, and Air Conditioning (HVAC) Systems can be time-consuming and frustrating, so we put together this list of the top 101 facts, notes, and statistics so you can easily reference them and refer back to them any time in the future.  This space is constantly changing, so if you see a fact that is not up-to-date, feel free to let us know. And if you know a stat that we should add, let us know that too!

Table of Contents

1. If your heating and cooling system is in good shape, the maintenance service will keep it working efficiently and help you avoid any unexpected repairs or replacement needs in 2023

-Regular maintenance service helps reduce the risk of costly repairs. It also helps maintain your home’s energy efficiency, reducing your utility bills and saving you money in the long run. Regularly cleaning or replacing filters can help improve air quality and prevent dust from building up inside your system.


2. The air handler is the indoor portion of a central heating or cooling system that moves conditioned air throughout the building.

– It contains a blower motor and fan that sends heated or cooled air into the ductwork. The air handler also brings in the air to be treated. In an AC unit, the air handler contains the evaporator coils that cool the air as it passes through.

3. The condenser is the outdoor unit of a central AC system. 

-It acts as a heat exchanger for the refrigerant, a chemical used in ACs that produces a cooling effect when it expands or vaporizes. The condenser contains the condenser coils, which release heat from the refrigerant into the outside air, and the compressor, which prepares the refrigerant to return indoors and cool more air.


4. HVAC is based on inventions and discoveries made by Nikolay Lvov, Michael Faraday, Rolla C. Carpenter, Willis Carrier, Edwin Ruud, Reuben Trane, James Joule, William Rankine, Sadi Carnot, and many others.

-Their work has led to the development of modern air conditioning systems and technologies.


5. Since 2010, residential cooling systems have contained a refrigerant called R-410a, a hydrofluorocarbon (HFC) that has high global warming potential and could harm the environment if it leaks from a cooling system.

-To reduce the impact on the environment, many countries have adopted regulations regarding HFCs and other refrigerants, such as the European Union’s F-Gas Regulation (EU) 517/2014. The use of certain refrigerants is being phased out over time while safe alternatives are identified and put into practice.


6. Lots of manufacturers of high-efficiency furnaces extend rebates toward the cost of a new system. 

– These furnaces feature energy-efficient components such as variable-speed blower motors, which let the thermostat optimize how much heating is generated. It’s a fantastic way to lower energy use overall. Local utilities also offer furnace rebates because less energy use means less strain on the local energy grid.


7. Advances in technology are driving the growth of HVAC equipment and systems.

-Smart thermostats, variable speed motors, advanced insulation materials, and improved air filters are just some of the innovations that improve efficiency and reduce energy consumption.


8. Home automation has revolutionized the way people interact with their HVAC systems.

-Integrated monitoring and control systems allow users to remotely adjust heating and cooling temperatures, as well as receive notifications when it is time to replace air filters or schedule maintenance.


9. Solar energy is becoming increasingly popular as a source of renewable power for HVAC systems.

-Solar-powered heat pumps are an efficient and economical way to heat and cool homes, as the energy from the sun is free and abundant.


10. In 2023, HVAC systems will be even more efficient than before due to the increased use of artificial intelligence (AI) for predictive maintenance and system optimization.

-AI will also allow systems to be self-learning and adjust based on user preferences, weather conditions, and other factors.

These advancements will make HVAC more efficient and cost-effective than ever before.


11. Mitsubishi Electric and Toshiba in Japan sold the first mini-split systems between 1954 and 1968. 

-This type of system allows homeowners to control temperatures in different rooms without having to install bulky ducts throughout the home.


12. In dry, hot climates, the evaporative cooling effect can be achieved by putting water near the air intake so that the draft draws air over the water and into the shelter. 

-This cooling effect can be used to reduce temperatures by as much as 10 F. This type of system is common in desert regions and is often used in conjunction with HVAC systems.


13. Air purifiers are an important part of the HVAC system, as they help to reduce indoor air pollution.

-Air purifiers use a combination of filters and ionizers to capture particles, bacteria, and other airborne contaminants that can cause respiratory issues or aggravate allergies. Regular maintenance is needed to ensure these systems are working effectively.


14. The motivation for the first air conditioner wasn’t comfort. Willis Carrier invented a modern air conditioner in 1902 for a publishing company in New York that was experiencing problems with ink control and paper expansion and contraction due to varying humidity levels.

-Since then, the technology has been refined and improved to provide greater comfort and energy efficiency.


15. Approximately 88 percent of new single-family homes constructed in America in 2011 included air conditioning. Compare that figure to how only 55 percent of Canadian households had air conditioning in 2013. Sounds like it is naturally colder in Canada.

-But in fact, the difference is mostly due to cost: Air conditioning is much more expensive in Canada than it is in the United States. This highlights the importance of considering cost when selecting and installing HVAC systems.


16. The first fully air-conditioned home was built in a mansion in Minneapolis in 1913 by Charles Gates. Sadly, he died before he could ever experience it.

-Nevertheless, the invention of air conditioning revolutionized the way people live and work indoors. From offices to homes, air conditioning has drastically improved our comfort and productivity levels by allowing us to stay cool during hot weather.


17. Electric fans were the predecessor to contemporary air conditioning.  

-Fans do little to cool the air, but they produce a “wind chill effect” by evaporating the sweat from your skin and lowering your body temperature.


18. Updating your system with “greener” technology can save you energy and money.

-By replacing old, inefficient HVAC systems with newer models that use high-efficiency compressors and other components, you can reduce your energy bill by up to 40 percent. Additionally, the newer technology is much quieter than traditional systems.


19. When AC systems were first introduced, the output settings were measured in “Ice Power”  units.

-This refers to the amount of energy required to melt a pound of ice in one hour. This measurement is still used today but has since been replaced by more accurate measurements such as SEER (Seasonal Energy Efficiency Ratio). The higher the SEER rating, the more efficient your system will be.


20. Air conditioning systems helped coin the term “Summer Blockbuster.”

-Back in the 1920s, movie theaters began installing air conditioning so they could attract people to escape the heat. Since then, many summer movies have become hugely popular and are now known as “Summer Blockbusters”. This is just one example of how HVAC systems can shape our everyday lives.  ​


21. Herbert Hoover was the first President to enjoy air conditioning.

He spent $30,000 to install the system in the oval office, just after the start of the Great Depression


22.If you wanted to buy a basic AC unit in the 1940s, it would cost you approximately $350. Translating that into today’s price based on inflation, you would be paying almost $3,500!

-Thankfully, modern air conditioners are much more energy-efficient and cost-effective than the ones of the past. Additionally, many utility companies offer rebates for upgrading to more energy-efficient systems.


23. The first car with optional Air Conditioning was introduced in 1939 by the automobile manufacturer Packard.

-Air Conditioning for cars quickly became popular and before long, air conditioning was an expected feature in most higher-end vehicles. Today, nearly all cars have air conditioning as a standard or optional feature.


24. The first commercial building to be cooled with HVAC was Macy’s department store in New York City.

-This was a monumental event, as it allowed the store to stay open for longer hours during the summer months and helped increase their profits. The success of this venture inspired other businesses to follow suit, leading to the widespread use of HVAC systems in commercial buildings today.  ​


25. In the past, water heating was more efficient for heating buildings and was the standard in the United States. Today, forced air systems can double for air conditioning and are more popular.

-Forced-air systems use a furnace to heat the air and then distribute it through ductwork.


26. MIT engineers have devised a modern air conditioning system that employs sensors attached to aluminum rods suspended from the ceiling.

-The sensors detect temperature, humidity, and other environmental factors. The data is then used to adjust the air conditioning system accordingly, resulting in more efficient cooling with less energy usage.


27.3D printed air conditioners can become commonplace in the future, despite their rarity today.

-The designs for 3D printed air conditioners are simple and lightweight, making them easy to produce with a 3D printer. Additionally, their small size and portability make them ideal for tight spaces like apartments or smaller homes.


28. Stuart Cramer is the first to coin the term “air conditioning” to describe this operation. 

-Cramer was an engineer who was working on ventilation systems in a textile mill in the early 1900s. He wrote a paper describing the process of cooling air and coined the term “air conditioning” to describe it. This term is still used today and has become ubiquitous in our everyday language.  ​


29. Air conditioners enable the indoor climate of a building to remain relatively constant, despite changes in external weather and internal heat loads.

-This helps to maintain a comfortable and productive environment for building occupants. Air conditioners also help to reduce humidity, which can lead to mold growth in certain climates.


30. The SEER rating of an air conditioner indicates its performance. 

-SEER stands for Seasonal Energy Efficiency Ratio and is an indicator of how efficiently the unit can convert electricity into cooling power. The higher the SEER rating, the more efficient the air conditioner is at cooling your home or building.  ​


31. Cooling towers were invented by Middle Eastern architects.

-Cooling towers are used in industrial HVAC systems to cool water. They were first designed by medieval architects who built them above public bathhouses to allow hot water from the baths to be cooled and reused multiple times. This same technology is still used today, though it has been modernized and improved for increased efficiency.


32. Ivy League status was given to the first ventilation system.

-In 1899, Cornell University constructed a ventilation system in the dissecting room so that students could dissect cadavers without being bothered by the smell.


33. Before the invention of air conditioning, schools, and businesses would slow down or take summer vacations to avoid working in the sun. 

-This was necessary because the lack of air conditioning meant that many buildings lacked comfortable temperatures in the summer months. With the invention of air conditioning, these shutdowns were no longer needed and businesses were able to operate all year round.  ​


34. HVAC systems can help reduce noise from outside sources.

-These systems can also be used to reduce sound levels within a building by absorbing or redirecting noise. This can help to create a more comfortable working environment and reduce the stress associated with high noise levels.  ​


35. The first domestic air conditioner, which was over 7 feet high, 6 feet wide, and 20 feet long, was installed in 1914.

-People were willing to pay between $10,000 and $50,000 for one, despite its size. That would be between $120,000 and $600,000 in today’s money! Residential air conditioning systems were only available to the very rich. Think about what a new HVAC system used to cost the next time you whine about how much it costs now.  ​


36. The average air conditioner is 85-90% efficient, meaning it uses only 10-15% of the energy that goes into it to cool the air.

-This means that AC units are much more efficient than they used to be and can help to save money on energy bills by using less electricity.  ​


37. Split air conditioners are becoming an increasingly popular choice for homes and businesses.

-Split air conditioners consist of two parts, an indoor unit, and an outdoor unit. The indoor unit is responsible for cooling the air while the outdoor unit contains the compressor and condenser coils which remove heat from the air. This type of system is ideal for people who want to maximize their energy efficiency as they are much more efficient than traditional single-unit air conditioners.  ​


38. Central air conditioning systems are generally the most affordable and practical choice for larger buildings or homes with multiple rooms.

-These systems use large evaporator coils located in the basement or attic to transfer heat from inside the building to outside. This type of system requires little maintenance and can provide even cooling throughout a large area.  ​


39. The first air conditioner in the White House cost $30,000.

-The first president of the United States to provide air conditioning in the White House was Herbert Hoover. An air conditioning system was constructed for $30,000 by the US government.  ​


40. The HVAC industry is responsible for 7% of total energy consumption in the US each year.

-This is a significant amount of energy, and it highlights how important air conditioning systems are to modern society. As technology improves, this figure will likely decrease over time as more efficient units become available.


41. Growing government support in the form of higher budget allocations aimed at increasing homeownership and sustainable community development, as well as rising housing affordability, will help to fuel the sector’s growth.

-Government initiatives such as the Housing Credit and Energy Efficiency Tax Credits are making it easier for many people to afford an HVAC system, which in turn is spurring demand. Additionally, increasing investments toward energy efficiency projects will drive the adoption of more efficient HVAC units. As a result, this sector shows promising growth potential in the years ahead.


42. Carrier publicly unveiled a new model of centrifugal chiller machine in May 1922 at the Rivoli Theater in New York, which had fewer moving parts and compressor stages than existing systems.

-The revolutionary device improved the efficiency and cost of large-scale air conditioners, allowing them to be used more widely throughout the world.


43. Because of its lower energy usage and environmentally friendly refrigerant, the DeVAP device is gaining popularity. 

-The DeVAP device uses a vapor injection process to cool and dehumidify air without the use of mechanical refrigeration. This makes it more efficient than conventional HVAC systems and better for the environment by reducing emissions. Additionally, it is designed to operate at lower temperatures, allowing users to save energy while still maintaining comfort levels.


44. The hybrid system of HVACs carries similar features to the split systems but they do have some basic differences.

-Hybrid systems combine elements of both split and central air conditioning systems. The indoor unit is a mini-split system, while the outdoor unit consists of a traditional compressor and condenser that operates in tandem with the mini-split system. This allows homeowners to benefit from the energy efficiency of a mini-split system while still having the convenience of a central air conditioning system. This hybrid design is becoming increasingly popular as it offers more options for temperature control and energy savings.


45. A duct-free or mini-split system comes with a huge upfront cost and a list of benefits for particular needs and applications. 

-Ductless mini-split systems are ideal for cooling specific areas in homes where ductwork is not an option. These systems consist of an outdoor compressor and condenser unit, connected to one or more air handlers that are installed inside the home. The temperature in each room can be controlled separately, making it a great solution for those looking to only cool certain areas of the home.


46. Thermally powered air conditioning is another design that has recently been introduced.

-Chromasun, an Australian company, has developed a low-cost alternative to conventional air conditioners. It isn’t yet a commonly used technology, and it will be years before this type of design is widely available in the United States. Thermally powered air conditioning, on the other hand, is a highly versatile and powerful device that uses solar energy and is supplemented by natural gas.


47.A packaged HVAC system contains everything including the compressor, condenser and evaporator in a single unit which is usually placed on the roof or near the foundation. It fulfills both the cooling and heating needs of a house.

-Packaged HVAC systems are popular amongst homeowners who lack the space for a traditional central air conditioning system, or those who don’t want to invest in an expensive and complex split system. Packaged HVACs offer convenience and energy efficiency at a lower cost than split systems, making them an attractive option.


48. The use of CFC and HCFC refrigerants causes ozone layer loss in our atmosphere, allowing harmful rays to reach our planet. 

-To substitute refrigerants like R-11, R-12, and R-22, newer ozone-safe refrigerants have been created. In newer air conditioning systems, non-ozone-depleting refrigerants like R-410a have been used.


49. President James Garfield was assassinated in the summer of 1881.  As a result, the White House was outfitted with an air conditioning system to protect future occupants from similar tragedies.

-Engineers devised a makeshift air conditioner to keep him cool to alleviate his pain. They blew air over wet cloth-wrapped ice blocks. It was easy, but it was enough to keep Garfield alive for nearly 11 weeks. This was the first air conditioning unit in history, paving the way for future innovations.


50.On a typical day, New York City consumes approximately 10,000MW per second. A significant amount of this energy is used to power air conditioning systems.

-During a heatwave, the number will rise to over 13,000MW. This massive energy consumption has led many to look for more efficient and sustainable solutions. Some companies are experimenting with using solar power as an alternative source of energy for air conditioning systems, while others are exploring ways to reduce the overall energy consumption of these systems.


51.Many homeowners overlook ventilation and temperature control.

-Having proper ventilation and temperature control in the home is essential for comfort and energy efficiency. Insufficient airflow can make a room feel stuffy and uncomfortable, while improper temperature control results in wasted energy as the system works harder to maintain an ideal temperature.


52.Charles Gates designed the first completely air-conditioned home in a Minneapolis mansion in 1913. 

-Gates was a pioneer in the field of air conditioning and his invention revolutionized the way we live. By controlling both temperature and humidity, Gates’ system allowed for cooling during hot summer months as well as heating during cold winters. His invention also improved indoor air quality by filtering out airborne toxins. Gates’ pioneering work paved the way for other inventors to develop even more efficient and cost-effective air conditioning systems.


53.Smart thermostats are a popular way to manage the temperature in homes and businesses.

-Smart thermostats can be programmed to maintain a desired temperature at different times of the day, resulting in greater energy efficiency as you don’t have to constantly adjust the temperature. They can also be connected to compatible devices, like voice-controlled assistants and mobile apps, making it easy to control the temperature from anywhere. Smart thermostats are a great way to save money on energy bills while also having greater control over your home environment.


54.Refrigerants have wreaked havoc on the world and continue to do so.


-The use of CFC and HCFC refrigerants has been the primary driver for environmental damage. These refrigerants are known to deplete the ozone layer, allowing harmful rays to reach our planet. To substitute these pollutants, newer ozone-safe refrigerants like R-410a have been created.


55. Wearable technology is a novel way for HVAC technicians to easily and effectively inspect and service air conditioning systems.

-Although there are many different types of wearable devices, eyeglasses are one of the most common. If HVAC technicians need help when servicing a machine, these wearable devices give them real-time access to off-site experts, allowing them to diagnose and repair problems faster. Additionally, this technology can also be used to collect and analyze data from the HVAC system, providing technicians with valuable insight into the performance of their systems.


56. Geothermal air conditioning and heating use the earth’s heat energy to heat and cool your home through an underground system (along with some familiar above-ground components). 

-Unlike conventional air conditioning systems, geothermal requires no fossil fuels and has a much smaller environmental footprint. Additionally, the cost of installation for geothermal systems is lower than traditional heating and cooling systems, making them an attractive option for homeowners looking to save money on energy bills over time.


57. If the surface of the evaporator coil is slightly colder than the dew point of the ambient air, air conditioning equipment can decrease the absolute humidity of the air processed by the device.

-This process is known as “latent heat removal.” By removing latent heat from the air, air conditioning systems reduce the temperature of the air and increase its relative humidity. This allows for more comfortable environments with less strain on heating and cooling systems. Latent heat removal can also be used to humidify a space, making it important for those that live in dry environments.


58. Chromasun, an Australian manufacturer, is working on chillers that run on gas and solar panels and are extremely energy efficient. 

-The solar thermal absorber panels are mounted on the top of the building and connected to a chiller unit below. The solar energy captured by the panels is used to heat water, which is then circulated through coils in the chiller unit and pushed out into the air conditioning system. This method of heating allows for decreased reliance on electricity and gas, making for more energy-efficient and cost-effective air conditioning systems.


59. Many buildings have an overall HVAC system that serves them, but there are troublesome areas that have different time and temperature specifications. 

-To address these needs, zoning systems can be installed. Zoning systems use dampers and thermostats to divide the HVAC system into different zones, allowing for greater control over the temperature in each area of the building.


60. The construction sector’s productivity in the United States is projected to reach USD 1.58 trillion by 2028, according to the Bureau of Labor Statistics. 

-The increased need to build and maintain the energy efficiency of existing systems is expected to drive substantial demand growth for HVAC services.


61. The St. Louis World’s Fair organizers used mechanical refrigeration to keep parts of the Missouri State Building that hosted fair activities cool in 1904. 

-It was capable of moving 35,000 cubic feet of air per minute and provided the public with the first taste of comfort cooling.


62. Evapolar, a Cyprus-based company, has released what it calls “the world’s first personal air cooler.” 

-It’s a small cube with a water tank and a fan that purifies the air while creating a breeze. Evapolar advocates the concept of a “microclimate” designed to cool a single person’s work or sleeping area, rather than cooling whole rooms or buildings, to save electricity.


63. General Motors’ Thomas Midgley, Albert Henne, and Robert McNary developed chlorofluorocarbon (CFC) coolants, which were the world’s first non-flammable refrigerating fluids, significantly enhancing air conditioner safety.

-CFCs were commonly used in refrigeration, air conditioning, and aerosol cans until it was discovered that they were harming the ozone layer. Today, hydrofluorocarbons (HFCs) have replaced CFCs as they are not harmful to the atmosphere.


64. Recyclable ductwork is made of triple-walled cardboard that has a fire-retardant, waterproof veneer applied to it. 

-It’s light, strong, and has low air leakage rates compared to metal ductwork. It is also easier to install because it requires fewer fittings and can be stapled or taped together. Furthermore, no insulation material is needed inside the ductwork as the cardboard itself provides some thermal protection. Recyclable ductwork is more energy-efficient and can help reduce the cost of cooling and heating in buildings.

​ ​​​​

65. In recent years, AC compressors have advanced greatly, providing yet another way to improve comfort and performance when cooling the home. 

-High-efficiency AC compressors use a cutting-edge scroll design that reduces friction, noise, and vibration. These compressors also have improved cooling performance by reducing the amount of time it takes to cool down a room or area within the home.


66. The first air conditioner was a block of ice.

-In the early 20th century, air conditioners used large blocks of ice to cool their systems. The ice would be melted during the day and then refrozen at night when temperatures dropped. This allowed for a cycle of refrigeration and dehumidification that created cooler, more comfortable temperatures for the occupants of buildings.


67. After WWII, air conditioning became something of a status symbol. 

-In 1953, over one million window units were sold due to their popularity.


68. The basic idea is that a chemical called a refrigerant loops from inside to outside and back, trapping and releasing heat in the process. 

-The refrigerant absorbs heat from inside the room and carries it to an outdoor evaporator coil where it is released, and then returns indoors to absorb more heat. The air handler or compressor in the system helps circulate the refrigerant throughout the system. By repeating this process, heat is removed from the inside and transferred outside, causing a cooling effect that lowers the temperature of the air inside. This is how modern air conditioning systems create comfortable environments in homes and businesses.


69.  When the principles of absorption refrigeration were discovered in 1824, it was discovered that liquefied ammonia could chill air when allowed to evaporate. 

-This discovery would eventually lead to the development of air conditioners that use ammonia as a refrigerant. Ammonia-based AC systems are more efficient and require less maintenance than systems that use chemical refrigerants, making them a popular choice for commercial applications.


70. Air conditioning can help avoid heat stroke, dehydration from excessive sweating, and other hyperthermia-related problems in hot weather.

-The cool air from an air conditioner helps restore the body’s natural balance and decreases the risk of heat stroke and dehydration caused by excessive sweating in hot weather. Furthermore, using an air conditioner can help reduce humidity levels in a room or area, creating a more comfortable environment for occupants. Air conditioning is also beneficial for those with allergies and breathing difficulties, as the filtered air can help reduce allergens and pollutants in the air.  ​


71. Mitsubishi Electric and Toshiba in Japan sold the first mini-split systems between 1954 and 1968. 

-Mini-split systems are a type of air conditioner that use an outdoor condenser unit and several indoor air handlers, connected by refrigeration lines. This allows for the flexibility to cool or heat individual rooms or areas within the home instead of cooling or heating the entire space. Mini-splits are much quieter than traditional window units and do not require costly installation, making them an attractive option for homeowners.


72. Variable-speed heat pumps, according to an Aeroseal survey, can save homeowners up to 40% on their monthly energy bills.

-Variable-speed heat pumps are a type of air conditioner that uses an inverter drive to regulate the speed of the compressor motor. This allows for more efficient operation and temperature control, reducing energy costs by up to 40% compared to traditional AC systems.


73. Carrier publicly unveiled a new model of centrifugal chiller machine in May 1922 at the Rivoli Theater in New York, which had fewer moving parts and compressor stages than existing systems. 

-Carrier’s centrifugal chiller was a revolutionary design that used fewer moving parts and compressor stages than existing air conditioning systems. The efficient design allowed for quieter operation, making them ideal for commercial applications such as theaters and offices.


74. Manufacturers of residential central air conditioners and heat pumps have been subject to Energy Department conservation requirements since 1992.

-The Energy Department requires all manufacturers of residential central air conditioners and heat pumps to meet energy efficiency standards. This helps ensure that these appliances are designed to use the least amount of energy possible, saving homeowners money on their monthly utility bills. Newer models must be at least 20% more efficient than older models to be certified by the government.


75. More and more people are choosing heat pumps as a means of both cooling and heating their homes. 

-Heat pumps are a great way to both cool and heat homes, as they can transfer heat from one area to another. This makes them more efficient than traditional air conditioners and furnaces, as the same unit can provide both cooling and heating capabilities. Heat pumps are also quieter and require less maintenance than other systems, making them increasingly popular for residential applications.


76. Since 1947, air conditioners have become smaller and less expensive.

-Air conditioners have become much more affordable and efficient over the years. Newer models are smaller and lighter than their predecessors, making them easier to install in homes or businesses.


77. Air conditioners and heat pumps can now be remotely controlled with the use of smartphones or tablets.

-Thanks to modern technology, air conditioners, and heat pumps can now be connected to an app on a smartphone or tablet. This allows users to control their systems from almost anywhere, making it easy to adjust the temperature and save energy when necessary.


78. Air purifiers are a great addition to an air conditioning system, as they help reduce allergens and pollutants in the air.

-Air purifiers are an excellent way to improve indoor air quality, especially for those with allergies or asthma. These devices use filters to capture dust, pollen, and other airborne particles from the air before it enters the air conditioning system. This helps keep the air inside homes and businesses clean and free of pollutants, making it easier to breathe.


79. Regular maintenance is essential for keeping your air conditioning system running efficiently and safely.

-Regular maintenance is key to ensuring that your air conditioning system runs smoothly and efficiently. This includes changing the filters, cleaning the condensate drain line, inspecting the evaporator coils, and checking for other potential problems. Scheduling regular maintenance can help prolong the life of the system, as well as help reduce energy costs and keep your home or business comfortable all year round.


 80. Installing a programmable thermostat can also help reduce energy costs.

-Programmable thermostats are an effective way to save energy in homes and businesses by reducing the amount of time an air conditioning system is running. These thermostats can be programmed to automatically turn off or adjust the temperature when no one is home, meaning you won’t waste energy cooling an empty house or office.


81. Geothermal systems are becoming increasingly popular as a way to heat and cool homes.

-Geothermal systems are an energy-efficient way of both heating and cooling homes by taking advantage of the constant temperature of the earth below the surface. This means that geothermal systems can provide heat in winter and cool air in summer, using very little energy in the process.


82. Air conditioners and allergies go together like peanut butter and jelly. 

-Air conditioners are a great way to reduce allergens in the air, as they help trap dust, pollen, and other airborne particles before they enter the home. Adding an air purifier to your system can further reduce allergens in the air. Regular maintenance of your air conditioning system is also essential for reducing allergens and keeping the air inside your home or business clean.


83. The Cave Dwellers were the first to build homes that were cooled by geothermal energy.

-The Cave Dwellers of the ancient Indus Valley Civilization were one of the first groups to use geothermal energy to cool their homes. They built air tunnels that went deep underground and allowed warm air from outside to be cooled by the constant temperature of the Earth. This process allowed them to keep their homes cooler in the summer months.


84.Since a two-stage compressor has two speeds to choose from, you can operate it at a lower speed when you don’t need as much cooling.

-Two-stage compressors are a great option for air conditioning systems, as they allow users to select between two speeds. This means that when full cooling power is not needed, the compressor can be operated at a lower speed to conserve energy.


85. To ensure the safety of your family, it’s important to install a carbon monoxide detector near your air conditioner.

-Installing a carbon monoxide detector near your air conditioning system is an important safety measure for any home or business. Carbon monoxide is an odorless, colorless gas that can be dangerous if it accumulates at high levels. By having a carbon monoxide detector in the vicinity of your air conditioning system, you can ensure the safety and well-being of your family or employees.


86. The Chinese built a massive fan with a diameter of ten feet in the second century. 

-The Chinese were one of the first civilizations to develop air conditioning systems. In the second century, they built a massive fan with a diameter of ten feet that could cool entire rooms. This invention would later inspire other civilizations to build more complex and efficient forms of air conditioning.


87. The Victorians were well-versed in the subject of air movement.

-The Victorians had a keen interest in the science of air movement. They took advantage of natural drafts and built homes that were designed to promote airflow. This allowed them to use fans, open windows, and other methods to keep their homes cool during the summer months.


88. Ding Huan of the Han Dynasty invented a rotary fan for air conditioning in the 2nd century. 

-In the 2nd century, Ding Huan of the Han Dynasty invented a rotary fan for air conditioning. This fan was powered by hydropower and used a series of blades to move air throughout an enclosed space. This invention allowed for more efficient cooling than ever before and would later be adapted by other cultures around the world.


89. Stuart Cramer is the first to coin the term “air conditioning” to describe this operation.

-In 1906, Stuart Cramer coined the term “air conditioning” when describing a system that could accurately control temperature and humidity. This set of operations quickly became popular across the world, and the term is still used today to describe air conditioning systems.


90. All new residential central air-source heat pump systems and air-conditioning sold in the United States will be expected to meet new minimum energy efficiency requirements and standards beginning in 2023. 

-The most recent minimum energy efficiency standards for these equipment types took effect in 2015, and for the first time, separate standards were established for cooling central air conditioners sold in the southern and northern sections of the United States. The new regulations maintain different cooling efficiency standards for air conditioners in the south, as well as requiring all air-source heat pumps to improve their heating efficiency.


91.In dry, hot climates, the evaporative cooling effect can be achieved by putting water near the air intake so that the draft draws air over the water and into the shelter.

-In dry, hot climates, an evaporative cooling effect can be achieved by using a simple device known as a “water wall.” This consists of placing water near the air intake so that the draft created draws air over the water and into the shelter. Evaporative cooling has been used for centuries in areas such as deserts to cool homes and buildings naturally. It is a simple and effective way to reduce temperatures without the need for complex air-conditioning systems.


92. Daikin developed multi-zone ductless systems in 1973, and VRF systems (which can be thought of as larger multi-split systems) in 1982.

-Daikin is one of the leading pioneers in air conditioning technology. They developed multi-zone ductless systems in 1973, which are a convenient and cost-effective way to cool multiple rooms or zones simultaneously. Daikin also invented VRF systems (variable refrigerant flow) in 1982, which can be thought of as larger multi-split systems. VRF systems are often used in larger buildings and offer the flexibility to cool different areas independently.


93. In modern air conditioning systems, refrigerant is used to absorb heat energy from the air inside a building and transport it outside.

-In modern air conditioning systems, a chemical known as a refrigerant is used to absorb heat energy from the air inside a building and transport it outside. This process is known as heat exchange, which allows for efficient cooling of the space without wasting energy. Refrigerants are usually synthetic fluids that evaporate easily when exposed to low temperatures. They are used in both residential and commercial air conditioning systems to keep environments comfortable year-round.


94. By creating a closed loop within the building, an air conditioning system can maintain a comfortable temperature throughout the space.

-Air conditioning systems work by creating a closed loop within the building. Refrigerant is circulated through this loop absorbing heat energy from inside and transporting it outside. This process allows for the air to be continuously cooled, and a comfortable temperature to be maintained throughout the space. To further optimize the system, additional features such as humidity control and air purification can be incorporated into the design of the air conditioning unit.


95. HVAC equipment will last 10-15 years if properly maintained, so maintenance is a big part of the HVAC industry. 

-HVAC (heating, ventilation, and air conditioning) equipment will last 10-15 years if properly maintained. To keep these systems running optimally for as long as possible, it is important to perform regular maintenance on the units. This includes cleaning filters and coils, inspecting ductwork for leaks, and checking refrigerant levels. The HVAC industry is therefore heavily reliant on maintenance and servicing to keep their equipment running correctly.  Without regular maintenance, HVAC systems may not be able to provide adequate temperatures for comfort or even break down prematurely.


96. Manufacturers of residential central air conditioners and heat pumps have been subject to Energy Department conservation requirements since 1992.

– From 1993 to 2023, the initial standard is estimated to save around $29 billion on energy bills. From 2006 to 2035, the standard is expected to save about $70 billion in electricity bills and prevent more than 369 million metric tons of carbon dioxide emissions, which is equal to the annual greenhouse gas emissions of around 72 million vehicles.


97.In the 1940s, a simple air conditioning unit would cost about $350. 

-In the 1940s, a simple air conditioning unit would cost around $350, which is equivalent to more than $5,000 in today’s money. Since then, technology has advanced significantly and AC units have become much more affordable. Nowadays, standard window-mounted air conditioners typically range between $200 and $500 depending on size.


98. Cooling towers were invented by Middle Eastern architects.

-Cooling towers were created by Middle Eastern architects in the late 19th century. These towers are used to cool down warm water from industrial processes like power generation and HVAC systems, while also conserving water by recycling it back into the system. The cooling tower is the air replaced with cooler, drier air from outside, which can result in a temperature drop of up to 10 degrees Fahrenheit in the room.


99.  To be energy efficient, air conditioners should be properly sized for the space they are cooling.

-To be energy efficient, air conditioners should be properly sized for the space they are cooling. When an AC unit is too small, it won’t have enough power to cool down the area, and it could end up running more often and spending more energy than necessary. On the other hand, if an AC unit is too large it will cycle on and off frequently, which can also lead to a higher electricity bill. Therefore, it’s important to choose an air conditioning system that is the right size for the area being cooled to maximize efficiency.


100.   The Energy Policy and Conservation Act (EPCA) of 1975 first gave the U.S. Department of Energy (DOE) authority to develop, revise, and implement minimum energy conservation standards. 

-Since then, the DOE has worked with a variety of stakeholders to develop and update standards for many types of energy-using products. These products range from common household items such as refrigerators and air conditioners to more specialized equipment like commercial boilers and industrial pumps.


101. The best HVAC systems are ones that meet the specific needs of homeowners.

-The best HVAC systems for any given homeowner are ones that meet their specific needs. Before purchasing a system, it is important to consider factors such as the size of the space to be conditioned and the climate in which it is located.

Do You Need an Furnace Repair Specialist You Can Trust?

Superior Mechanical Services, Inc. began in 1948 as a family-owned business with a vision to provide value-minded service with a down-to-earth approach to customers throughout the San Francisco Bay Area. As the premier Commercial and Residential A/C Repair Specialist for Pleasanton, Dublin, and Pleasanton, Superior Mechanical can do it all, from repairing heating and air conditioning services to boiler services, to plumbing services! Our technicians are certified professionals who will ensure every part of your project is done right using a careful checklist to guide and test each step. At the end of your appointment, we’ll show you how to get the most out of your new system and give you tips on maintenance so it lasts for years to come. Contact us today for amazing service tomorrow!

Air conditioning contractor, Heating contractor

For any kind of HVAC installation, repair, and maintenance requirement contact our experts by email at info@superiormsi.com or call (925) 456-3200

Skip to content