Nominal size is 20x25x6. Actual size is 19.5 x 24.5 x 5.88. MERV 11 - Tested and rated according to ASHRAE Standard 52.2. Each filter lasts up to 3 months optimally. Uniform pleat shape enhances dust holding capacity and maximizes air flow. Supercharged pleated panel filtering media ideally suited for capturing fine airborne allergens.
