14 x 24 x 1 Glass Air Filter E721

Flanders (4 Filters) . 14' X 24' X 1' Precisionaire Nested Glass Air Filter. This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50-years. The filtering medium is continuous filament spun glass. The frame is made with one continuous piece of chipboard to guard against corner separation. For peak equipment protection and energy efficiency . these filters should be changed monthly in periods of high use. Buy a case and be set for the year.