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What are the Major Components of a HVAC System

Author: Riki William
by Riki William
Posted: Jul 23, 2022
air conditioning

Heating, ventilation, and air conditioning is the system that helps in making your home heat and cold. In the summer, the air conditioning keeps your home cool and comfortable, while in the winter the heating furnace will make your home hot. HVAC systems have a variety of components, and all of these components work together to get the overall system performance. Understanding the parts of your HVAC system can help you to maintain the system properly and it is easier to find and fix the problems.

Major Components of the HVAC System:

The following are the major components that help in operating a heating, ventilation, and air conditioning system.


A thermostat uses the temperature sensor which helps in indicating whether the heater or the air conditioner should be running or turned off. It also helps in stabilizing the temperature in your home, which affects the quality of air and humidity levels. When a thermostat is not installed or calibrated properly, it can cause the system to run over time and is ineffective in giving heat or cool to the place.

Heat Exchanger:

Heat exchangers are more responsible for transferring the heat to the system. They are used in both heating and cooling systems and help in moving the heat from one place to another. Air conditioners use a refrigerant as a chemical liquid to move heat and turn it to cool air then blow through ducts and vents to the room. With gas furnaces, the exchanger warms the indoor air by using combustion gases and distributes the warm air throughout the space.

The main problem with the heat exchanger is that could lead to a carbon monoxide leak, which can cause nausea, headache, or even worse. All parts of your heating and air conditioning systems should be inspected and repaired properly by a professional at least once a year to avoid severe damage.

Blower Motor:

Blower motors are helpful in moving the cool or hot air through the entire system using ductwork. Blower motors use electricity to get power ad uses the fan to circulate the air. The flow of the air can be adjusted by modifying the speed of the motor. Commercial HVAC systems have more powerful motors to distribute the air evenly throughout the larger space, whereas residential unit blower motors are smaller and simple in design, which is easier to maintain and repair.

Condenser Coil:

The compressor or condenser coil is the important part of the HVAC component which is located outside. The warm refrigerant gas is taken to the compressor to dissipate the heat to the outer environment and turn it into liquid form. The liquid refrigerant is taken to the evaporator coil through copper or aluminum tubes. A fan is used in increasing the amount of airflow passed to the coil and also boosts the process of condensation.

Evaporator Coil:

The evaporator coil receives the condensed refrigerant liquid from the compressor, and it is located indoors. The liquid refrigerant is atomized by spraying nozzles, which helps in increasing the evaporation rate of the refrigerant when it comes to contact with the warm air present in the room.

Combustion Chamber:

It is also known as a burner, which heats the cool air. For a gas furnace, the heating cycle starts when a small amount of air and gas mixture enters the combustion chamber. Then, a glow stick or the pilot light ignites the mixture and burns in a controlled fire as more air and gas move into the burner.


Forced air heating and cooling rely on several ducts in order to distribute the air throughout your home. Good ducting is essential in the HVAC systems to have high-quality air delivered all around your home. Ducts should be sealed and insulated properly by using various insulating materials. These insulating materials are being cut by the insulation cutting machine in order to maintain perfect insulation and prevent duct leakage.


From the above you know about the basic parts of the HVAC system. Make sure to inspect and maintain the components regularly to achieve the perfect condition in working.

About the Author

Ricky is a graduate of computer science engineering, a writer and marketing consultant. he continues to study on Nano technology and its resulting benefits to achieving almost there.

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  • Guest  -  1 year ago

    nice article!

Author: Riki William
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Riki William

Member since: Feb 11, 2017
Published articles: 1613

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