How Often Should You Change Your HVAC Filter?
Check your HVAC filter every month and replace or clean it when it is dirty, following the filter and equipment manufacturer’s instructions. For many homes, replacement is needed about every 1 to 3 months; pets, allergies, smoke, construction dust, heavy system use, and thinner filters can make more frequent changes necessary.
Inspect and Change HVAC Filters
Clogged HVAC filters cause your HVAC system to work harder - resulting in a bigger utility bill. Changing HVAC filters saves HVAC costs and enhances air quality to reduce allergies.
What happens if I don’t change the filter?
A clogged filter restricts airflow. That can make heating or cooling equipment run longer, reduce comfort and efficiency, and add wear to the blower motor. A clean, correctly fitted filter can also reduce indoor airborne particles, although filtration does not remove every pollutant.
How do I find my HVAC filter size?
Turn the system off, remove the current filter, and look for dimensions printed on its frame, usually shown as length × width × thickness. Record both the printed nominal size and, when available, the actual dimensions. Never force a filter that does not fit.
Where is the HVAC filter located?
Common locations include a large return-air grille in a wall or ceiling, a filter slot beside the furnace or air handler, or inside the equipment cabinet. Some homes have more than one return filter. Check the equipment manual or ask an HVAC professional if the location is unclear.
How often should different filter types be changed?
Thin disposable filters often need attention sooner than deeper pleated media filters, while washable filters are cleaned and reused. Because construction and operating conditions vary, use the manufacturer’s interval as your baseline and inspect monthly. Change it sooner when visibly dirty or when airflow drops.
Turn this advice into a simple home-care routine.
Correct Home Care can email you when it is time and keep the filter size handy for your next purchase.
Guidance reviewed against the U.S. Department of Energy and U.S. Environmental Protection Agency. Your equipment and filter manufacturer’s instructions take precedence.