According to HVAC best practices, how often should air filters be checked or replaced?

Regularly checking or replacing air filters is crucial for maintaining optimal HVAC system performance and indoor air quality. The recommendation to check or replace filters once a month is based on several factors that can affect filter longevity, including the type of filter being used, the level of contaminants in the environment, and the usage of the HVAC system.

Filters serve the essential function of trapping dust, pollen, and other particulate matter, allowing clean air to circulate throughout a space. If these filters become clogged, not only can they hinder airflow, leading to less efficient cooling or heating, but they can also negatively impact the system’s energy efficiency and lifespan. Regular monthly checks help ensure that the filter is clean and functioning properly, allowing the HVAC system to operate efficiently.

Certain conditions, such as high pollen counts, pet dander, or construction activities nearby, may necessitate more frequent checks or replacements than just once a month, but the guideline serves as a best practice for most households and environments. This proactive maintenance helps to avoid larger, costly repairs down the line and ensures that air quality remains high.