HVAC Excellence Commercial Air Conditioning ESCO Certification Practice Exam 2026 - Free ESCO Certification Practice Questions and Study Guide

The primary function of an air handler in an HVAC system is to circulate conditioned air throughout the building. It plays a crucial role in the overall operation of the heating, ventilation, and air conditioning system by taking in air from the space, conditioning it (either heating or cooling), and then distributing it back into the living or working environment.

Air handlers contain a fan or blower that is responsible for moving the air through the heating and cooling components of the HVAC system. This circulation process ensures that the air remains at a comfortable temperature and helps maintain consistent airflow throughout the various areas of the building.

While air handlers may have additional features such as filtering capabilities or humidity control systems, their primary purpose is to effectively circulate the conditioned air, ensuring that occupants experience a comfortable and healthy indoor climate.