What is the purpose of an air handling unit (AHU) in HVAC systems?

The purpose of an air handling unit (AHU) in HVAC systems is to condition and circulate air. This involves several key functions that enhance comfort and air quality in indoor environments. An AHU typically includes various components such as filters, heating and cooling coils, and fans that work together to modify the air temperature and ensure proper ventilation.

When air enters the AHU, it can be filtered to remove dust and particulates, then heated or cooled to achieve the desired temperature. Additionally, the fans within the AHU play a crucial role in moving the conditioned air throughout the building's ductwork, ensuring consistent airflow to different spaces. Thus, the AHU is integral to maintaining a comfortable and healthy indoor climate by actively managing air quality and circulation.

While an AHU can play a role in regulating humidity levels, that is not its sole purpose and typically involves additional systems or components. Similarly, while AHUs can be designed to exhaust stale air, they mainly serve to condition and circulate fresh air rather than focus solely on exhaust. Storing excess air is not a function of AHUs, as they are designed to treat and distribute air rather than hold it.