Residential HVAC Installation Practice Exam 2025 - Free HVAC Practice Questions and Study Guide

Changing air filters regularly is essential for maintaining HVAC efficiency. Air filters play a crucial role in trapping dust, dirt, and other airborne particles that can obstruct airflow. When filters are clogged, the HVAC system must work harder to push air through, leading to increased energy consumption and reduced efficiency. Additionally, dirty filters can negatively impact indoor air quality and strain the system, potentially causing premature wear and tear, ultimately shortening the equipment's lifespan.

Regularly inspecting and replacing air filters helps ensure optimal airflow, improves indoor air quality, and extends the life of the HVAC system. This practice is generally recommended every one to three months, depending on factors such as the type of filter used, the presence of pets, and the level of dust in the environment. Keeping air filters clean is a straightforward yet effective way to maintain the efficiency of an HVAC system.