High performance return grille filters provide air filtration equivalent to typical 4" (102 mm) media filters in a 1" (25 mm) return grille space. These filters offer MERV 11 performance - providing superior filtration, cleaner indoor air, reduced levels of dust and other airborne contaminants, and enhanced system performance.
FEATURES/BENEFITS Easy Installation and Fit - The unique header design makes the filter easy to install in most 1" (25 mm) filter grilles. The header rests securely into the frame, and the cartridge extends beyond the frame. Performance and Efficiency - With MERV 11 efficiency, the filter will capture up to 80% of particles down to 1.0 microns - including many types of household dust, pollens, spores, mold, allergens, and bacteria. Holding capacity compared to 1" filters is greatly enhanced with nine square feet of actual filter media per one square foot of filter face. This extends the life of the filter considerably over standard filters without sacrificing airflow due to increased pressure drop.