With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. A human hair is about 70 microns wide. This high performance air filter will outperform non-electrostatic fiber-glass filters, washable filters, and poly disposable...
Model 16x24x1. People with pets or those who suffer from allergies should change their A/C air filters more often. Important Note: Almost all air condition filters have a different Actual Size than Nominal Size printed on the air conditioning filter....
Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air filter. With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer....
Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air filter. With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer....