Merv 13 Pleated Air Filter - 14" x 18" x 1" Quantity:12-pack The Pad and Frame Air

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

To find the size the old unit should have sizing information printed on it

some just refer to them as electrostatic filters

with each stage capturing progressively smaller particles inside the filter

we even have the odd sizes

Merv 13 Pleated Air Filter - 14" x 18" x 1" Quantity:12-pack The Pad and Frame 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.