Merv 13 Pleated Air Filter - 9 1/8" x 9 1/8" x 1" Quantity:12-pack The "Practical Pleat" media is

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

with each stage capturing progressively smaller particles inside the filter

To order washable electrostatic custom air filters you just need to know the size of the current air filter

if not you can measure it or check the HVAC unit and the owner‰۪s manual

we even have the odd sizes

Merv 13 Pleated Air Filter - 9 1/8" x 9 1/8" x 1" Quantity:12-pack The "Practical Pleat" media isAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter.