Merv 8 Pleated Air Filter - 16 1/2" x 21 1/2" x 1" Quantity:12-pack the "A+2000" brand Permanent Washable

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

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

oxidation and deterioration

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

Merv 8 Pleated Air Filter - 16 1/2" x 21 1/2" x 1" Quantity:12-pack the "A+2000" brand Permanent WashableAny 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.