Merv 8 Pleated Air Filter - 21 1/2" x 23 1/2" x 1" Quantity:12-pack if not you can measure

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

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

so it can provide a lifetime of dependable service

degrade and restrict air flow

Because we specialize in custom air filters

Merv 8 Pleated Air Filter - 21 1/2" x 23 1/2" x 1" Quantity:12-pack if not you can measureAny 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.