Which part of the HVAC system helps maintain regulated indoor air quality?

The air filters are crucial components in maintaining regulated indoor air quality within the HVAC system. Their primary function is to capture dust, dirt, pollen, and other airborne particles that can adversely affect the air quality in a home or building. By filtering out these contaminants, air filters help to ensure that the air circulated throughout the space is cleaner and healthier for occupants.

Regularly changing or cleaning air filters is essential to support this function. When filters become clogged, not only does the air quality decline, but it can also lead to decreased system efficiency, increased energy consumption, and potential strain on HVAC components.

While the thermostat plays a key role in controlling temperature settings, and both the compressor and evaporator coil are integral to the cooling process, they do not directly impact the air quality like air filters do. Their primary functions focus more on temperature modulation rather than filtration of air contaminants.