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4" - MERV 8 High Capacity Filters (Price includes shipping)
The Koch Multi-Pleat XL8 is a medium efficiency extended serface pleated panel filter, engineered to provide higher initial efficiencies and better overall performance than standard pleated filters. The Multi-Pleat XL8 carries a MERV 8 fractional efficiency rating in accordance with ASHRAE Test Standard 52.2. The filter will also provide an Initial Dust Spot Efficiency of 39%, and an Average Dust Spot Efficiency of 35-45% in accordance with ASHRAE Test Standard 52.1.