Quick view Compare Choose Options 16x25x4 MERV 13 HVAC Air Filters $25.75 As Low As $20.15 Per Filter! 16 x 25 x 4 HVAC Air Filter. Actual Size: 15-1/2 x 24-1/2 x 3-3/4. Filter Rating: MERV 13 | FPR 10 | MPR 2200. Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog, lead...