4 Inch Air Filters

20x20x4 MERV 11 HVAC Air Filters

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

18x24x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   18 x 24 x 4 MERV 8 HVAC Air Filters Actual Dimensions: 17 3/8” x 23 3/8" x 3 3/4”Filtration Rating: MERV 8, MPR 600, FPR 5Blocks and captures lint, dust, pet dander, pollen, dust mites, & mold Our...

18x24x4 MERV 13 HVAC Air Filters

As Low as $22.39 per Filter!    18 x 24 x 4 HVAC Air Filter.  Actual Size: 17-3/8 x 23-3/8 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke,...

18x24x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!   18 x 24 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 17-3/8 x 23-3/8 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria,...

16x25x4 MERV 8 HVAC Air Filters

As Low as $12.31 per Filter!   16 x 25 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 15 ½” x 24 ½” x 3 ¾”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and...

16x25x4 MERV 13 HVAC Air Filters

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...

16x25x4 MERV 11 HVAC Air Filters

As Low As $16.79 Per Filter!  16 x 25 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 15-1/2 x 24-1/2 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria, Dust...

16x24x4 MERV 8 HVAC Air Filters

As Low As $12.31 Per Filter!  16 x 24 x 4 MERV 8 HVAC Air Filters.  Actual Dimensions: 15 ½” x 23 ½” x 3 ¾”.  Filtration Rating: MERV 8, MPR 600, FPR 5.  Blocks and captures...

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...

12x24x4 MERV 8 HVAC Air Filters

  As Low As $12.31 Per Filter!   12 x 24 x 4 MERV 8 HVAC Air Filters.   Actual Dimensions: 11 3/8” x 23 3/8” x 3 3/4”.   Filtration Rating: MERV 8, MPR 600, FPR 5.   Blocks and captures...