4 Inch Depth

16x20x4 MERV 10 AC Furnace 4 Inch Air Filters. 2 Pack. Actual Size: 15-1/2 x 19-1/2 x 3-3/4

Fast Free Shipping on 16 x 20 x 4 MERV 10 AC & Furnace 4 Inch Air Filters. Actual Size: 15-1/2 x 19-1/2 x 3-3/4.  Filtration Rating: MERV 10, MPR 600-700, FPR 5-6. Protects: Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog,...

16x20x4 MERV 8 HVAC Air Filters

As Low As $12.31 Per Filter!   16 x 20 x 4 MERV 8 HVAC Air Filters.  Actual Dimensions: 15 ½” x 19 ½” x 3 ¾”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and...

16x20x4 MERV 13 HVAC Air Filters

As Low As $20.15 Per Filter!   16 x 20 x 4 HVAC Air Filter.  Actual Size: 15-1/2 x 19-1/2 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog,...

16x20x4 MERV 11 HVAC Air Filters

As Low As $16.79 Per Filter!  16 x 20 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 15-1/2 x 19-1/2 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria, Dust...