4 Inch Filters

24x24x4 MERV 11 HVAC Air Filters

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

20x25x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!   20 x 25 x 4 MERV 11 HVAC Air Filters.  Actual Dimensions: 19-1/2 x 24-1/2 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria,...

20x24x4 MERV 11 HVAC Air Filters

As Low as $16.79 per Filter!  20 x 24 x 4 MERV 11 HVAC Air Filters. Actual Dimensions: 19-3/8 x 19-3/8 x 3-3/4 .   Filtration Rating: MERV 11, FPR 7, MPR 1000.  Protection: Smoke, Pet Dander, Pollen, Bacteria, Dust Mites,...

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 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 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...

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 11 HVAC Air Filters

  As Low As $16.79 Per Filter!   12 x 24 x 4 MERV 11 HVAC Air Filters.   Actual Dimensions: 11-3/8 x 23-3/8 x 3-3/4.   Filtration Rating: MERV 11, FPR 7, MPR 1000.   Protection: Smoke, Pet Dander, Pollen,...