What is an HVAC System and How Does it Work?

The first and most important thing is that HVAC refers to heating, ventilation and cooling. The HVAC system is used to provide heating and cooling for residential as well as commercial buildings. HVAC systems can be found in any home from single-family houses to submarines that provide the necessary environmental comfort. The popularity of HVAC systems is increasing for new buildings, the systems utilize fresh air from the outdoors to give you a the highest quality indoor air.

The HVAC  also known as ventilation is the process of changing or exchanging air in a room. This improves the air quality inside and is the removal of smoke, moisture, scents dust, heat, carbon dioxide, airborne bacteria and various gases as along with controlling temperature and replenishing oxygen.

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What is an HVAC System Work?

The three primary roles of HVAC systems are interrelated, particularly when providing a good indoor air quality as well as thermal comfort. Your air conditioning and heating system is usually considered to be one of the largest and most complex and intricate systems within your home, however in the event that it ceases to function, you’ll be able to tell when it’s broken! There are nine components of your HVAC system you must be aware of the air return filter, the exhaust outlets, filters and ducts, electrical components including outdoor unit coils, compressor and blower.

Air Return

The air return forms the component of your system that is the beginning of the ventilation process. The return draws in air, then draws it into a filter and then releases it to the system that is in charge. The best advice is that you clean your return regularly because dust and debris can quickly build up on the filters.


The filter is the second component in the return of air which air is drawn through. A tip to remember: Be sure that you replace your filters frequently to ensure your system stays in good shape.

Exhaust Outlets

Another component of your system are the exhaust outlets, where the combustion generated by your heating system is released. A tip to check your chimney’s flue or vent stack every year and adjust it in the event of need.


The ducts you have are the channels through which the cool or heated air flows through. A tip to remember: Have your ducts cleaned each two to five years to ensure everything is in good in good working order.

Electrical Elements

This section of your system may be a little more complicated and often, problems start in this area first. Tips: If you notice that you notice something not working, check for the possibility of a tripped breaker or dead battery inside your thermostat.

Outdoor Unit

This is probably the component of your system you’re thinking of when someone speaks of the HVAC unit. This is the part that houses your fan, which allows air to flow. A tip to keep your unit free of any debris and plants as they can cause serious damage when plants get sucked into the fan.


As an element of the outdoor unit it is responsible for converting refrigerant an oil to liquid and then transferring it to coils. A tip for you: If you notice that you notice that something isn’t functioning properly examine your compressor. It’s usually the cause of numerous system malfunctions.


Aside from the outdoor unit, the coils help to cool the air as it moves through, with assistance from the refrigerant. The best advice is to inspect your coils every year. If they begin to freeze, you might want to test your refrigerant and filter levels.


The blower pulls warm air to the main portion of the device. A tip to remember: the more efficiently the air is moved through, the stronger your unit will be.

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What is included in an HVAC System

We now are aware that HVAC is a term used to describe heating, air conditioning, and ventilation and we are aware that these are the three major components that comprise the whole system.

The heating element is usually referring to a boiler or furnace. It also includes pipes for the heating fluid or duct work when you’re using an air conditioning system that is forced.

The element of ventilation is natural or forced , and when forced, it is frequently employed for air cleansing for other reasons as well.

Many of us are aware that the third and last component in an HVAC unit is cooling, which does exactly the opposite to heating. The main goal of air conditioning is to eliminate any heat present in the inside of the house.

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