What is the purpose of a filter in an HVAC system?

The primary purpose of a filter in an HVAC system is to remove dust, allergens, and other particulates from the air. By capturing these particles, the filter helps to improve indoor air quality, which is vital for the health of occupants and the efficiency of the HVAC system. An effective filter prevents dust and allergens from circulating through the system and the living space, reducing the risk of respiratory problems and allergies.

The filter also protects the components of the HVAC system itself. By capturing debris before it enters the system, the filter helps prevent clogging and damage, which can lead to inefficient operation or costly repairs. This function is critical to ensuring that the air delivered to the spaces being conditioned is as clean as possible.

While other options address various aspects of HVAC performance, such as temperature regulation and energy efficiency, they do not represent the primary function of an HVAC filter. The main role remains focused on air quality improvement through particulate removal.