12pk Precisionaire/ Flanders 16"x25"x1" Ez Flow Ii Spun Fiberglass Furnace Air F The EZ Flow II Disposable Filters Are Designed For Protection of Furnace And Central Air Units In Residential And Light Commercial Applications. The Filtering Medium Is Continuous Filament Spun Glass. The Frame Is Made With 1 Continuous Piece of Chipboard To Guard Against Corner Separation. Maximum Air Flow. Alleviates Strain On Equipment. For Peak Equipment Protection And Energy Efficiency; These Filters Should Be Changed Monthly In Periods of H