SpiroPure Pleated Air Filter

A MERV 8 rating indicates that these filters are effective at capturing common household particles like dust, lint, and pollen. It strikes a balance between filtering out everyday debris and maintaining sufficient airflow for your HVAC system, making it a standard choice for residential use.

Always check the dimensions printed on your current filter or your HVAC unit's manual. This specific model has a nominal size of 11.5 x 21.5 x 1 inches, but the actual dimensions are 11.5 x 21.5 x 0.75 inches, so be sure to measure your filter slot carefully to ensure a snug fit.

Yes, these filters are designed to be compatible with both residential furnace and central air conditioning systems. They are engineered to handle the airflow requirements of both heating and cooling cycles.

For optimal performance and to keep your HVAC system running efficiently, we recommend replacing these filters every 90 days. If you have pets or live in a particularly dusty environment, you may want to check them monthly and replace them sooner if they appear visibly clogged.

The nominal size is a rounded industry standard used for labeling, while the actual size is the precise measurement of the filter. It is common for filters to be slightly smaller than their nominal dimensions to ensure they slide easily into the filter housing without bending or damaging the frame.