Koch Duo-Cap Cartridge Filters are constructed with a progressively dense synthetic media. (Also available with microfiberglass upon request). This graded density construction ensures low resistance to air flow, high dust holding capacity, and prolonged filter lifecycles. Duo-Cap is designed to fit Cambridge Filter Corporation Hi-Cap and SideCap frame systems without modification to existing framework. Features: Medium Efficiency Extended Surface Cartridge Filters MERV 8 performance rating (ASHRAE Test Standard 52.2-2012) Superior dust holding capacity Extended filter lifecycles Low initial pressure drop Standard Duo-Cap Filters – Polyester Media 1 Ply
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