What type of system is an AHU a part of in a building?

An Air Handling Unit (AHU) is an integral component of the HVAC (Heating, Ventilation, and Air Conditioning) system in a building. The primary function of an AHU is to regulate and circulate air as part of the overall air management in heating and cooling processes. It conditions the air through heating or cooling coils, filters, and fans, ensuring that the indoor environment remains comfortable and that air quality is maintained.

The role of the AHU encompasses multiple tasks such as filtering air to remove particulates, adjusting humidity levels, and providing necessary heating or cooling. Its connection to other HVAC components, like chillers, boilers, and ductwork, exemplifies its central position in the climate control function of a building, which is critical for occupant comfort and energy efficiency.

Other systems such as plumbing or electrical systems serve different purposes and don't include the air handling or climate control functions that define an AHU's role, thus reinforcing why HVAC is the correct categorization.