Quick view Compare Choose Options 20x20x4 MERV 13 HVAC Air Filters $27.99 As Low as $22.39 per Filter! 20 x 20 x 4 HVAC Air Filter. Actual Size: 19-1/2 x 19-1/2 x 3-3/4. Filter Rating: MERV 13 | FPR 10 | MPR 2200. Protects: Pollen, dirt, dust, pet dander, viruses,...
