What common factor can affect a HVAC system's performance?

A clogged air filter is a common factor that can significantly affect an HVAC system's performance. When air filters become clogged with dust, debris, and other particles, they restrict airflow through the system. This reduced airflow can lead to several issues, including decreased efficiency of the HVAC unit, increased energy consumption, and potential overheating of the system components.

Inadequate airflow can also cause the HVAC system to work harder to maintain the desired temperature, leading to wear and tear on the equipment and potentially shortened system lifespan. Regular maintenance, including changing or cleaning air filters, is essential to ensure optimal airflow and overall performance of the HVAC system.

While high humidity levels, excessive refrigerant charge, and outdated thermostat settings can also impact HVAC performance, a clogged air filter is often a more immediate and commonly encountered issue that directly disrupts airflow and system efficiency.