What is the role of an air handler in an HVAC system?

The air handler serves a critical function in an HVAC system by circulating and distributing air. This centralized component typically contains a blower, heating or cooling elements, and filters, which work together to ensure that conditioned air is evenly distributed throughout the building. By drawing air from the indoor space and passing it over the heat exchangers or coils, the air handler effectively adjusts the temperature of the air before it is sent into the living or working areas.

This circulation process is essential for maintaining comfortable indoor conditions and for the efficiency of the overall HVAC system. Proper air distribution helps to eliminate hot or cold spots within a space, contributing to an even and comfortable environment. Additionally, when paired with filters, the air handler also plays a role in improving indoor air quality by removing particulates and contaminants from the air.

The other options mentioned have distinct functions that do not align with the primary responsibilities of an air handler. For example, cooling the refrigerant is a function typically associated with the evaporator coil within the air conditioning system. Storing excess refrigerant is not part of an air handler's role, as refrigerant management is handled by the compressor and receiver/dryer. Removing moisture from the air is primarily the responsibility of the dehumidifier or the coil within the air