What Are The Four Main Components Of HVAC?

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Like any other electrical device, an air conditioner is a systematic arrangement of many components. The efficiency of an air conditioner depends on the way its components function. All these components must work smoothly so that the air conditioner works efficiently.

Any fault in these components affects the productivity of the air conditioner severely. It leaves you frustrated and in an unwanted cycle of contacting your technician for air conditioning repair in Vancouver, WA.

Four components of an HVAC system that homeowners should know about and take care of

  • Evaporator coil: The evaporator coil is present in the indoor units of a mini-split air conditioner. While in a central system, these evaporator coils are in the air handler. The evaporator coils help to cool the warm air in your home. As warm air draws into the HVAC unit, it blows over the evaporator coils, which extract the heat and help to cool the air.

    Over time they might accumulate dirt and debris, which reduces their efficiency. Therefore, it is essential to keep the evaporator coils clean. Moreover, this dust and debris can block the condensation drain and result in a refrigerant leak. 

  • Compressor: A compressor is an essential component of the air conditioner. Most of the air conditioner’s energy consumption is from the compressor. Moreover, it is generally the most expensive part of the air conditioner. The size of the compressor may vary with the size of your air conditioner.

    Regular maintenance and AC tune-up in Battle Ground, WA, from a professional technician are essential to prevent any expensive fault in the air conditioner. Checking for refrigerant leaks, preventing dirt and debris, and keeping the condenser coils clean can also help to maintain a healthy compressor. 

  • Condenser coil: The condenser coils pull away heat from the refrigerant and eject it to the outside environment. It is present in the outdoor unit of your air conditioner. If you stand outside the outdoor unit of your air conditioner, you can feel the hot air.

    It is heat that the condenser is expelling, during the process of changing the refrigerant from a hot vapor to a hot liquid. Therefore, cleaning the condenser coils is necessary to maintain an efficiently working air conditioner.
  • Expansion valve: The expansion valve is present between the condenser and the evaporator. In the liquid state, the refrigerant will not be able to absorb heat. That is why, in the expansion valve, this refrigerant expands to gas and is rapidly cooled.

    Then, this cooled refrigerant goes into the evaporator coils to repeat the air conditioning process. The expansion valve is generally small in size. Therefore, it is more prone to collect dust that will be hard to remove.


There are some problems with the air conditioner that can reduce its efficiency. Home Energy Group, Inc, with its newfound knowledge about air conditioner components, will help AC owners understand the working of air conditioners in a better and simple way. Moreover, owners will be able to experience the best outcome from their air conditioners with the help of our services.