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Koch Air Filter 16 x 20 x 4 MERV 11 Multi Pleat XL11 Pleated Air Filter 6 Pack Anti Mold Ideal for commercial and industrial Central Air Purification Ideal for commercial and industrial settings Also included is the Mitsubishi MAC 408FT E anti allergy enzyme mini split filter Actual dimensions are 15½" × 19½" × 3¾" — nominal 16 x 20 x 4 It is a meaningful step up from MERV 6–7 filters without the high static pressure drop of MERV 13+ filters that can strain residential HVAC equipment
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