Merv 13 Pleated Air Filter - 23" x 23" x 1" Quantity:12-pack Unlike some permanent custom air

Unlike some permanent custom air filters

these can be purchased in any conceivable size

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

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

28X Increased Efficiency

Merv 13 Pleated Air Filter - 23" x 23" x 1" Quantity:12-pack Unlike some permanent custom airAny 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.