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4 Inch Filters

  • 12x24x4 MERV 11 HVAC Air Filters

    12x24x4 MERV 11 HVAC Air Filters

    $18.99

      As Low As $14.99 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,...

  • 16x20x4 MERV 11 HVAC Air Filters

    16x20x4 MERV 11 HVAC Air Filters

    $18.99

    As Low As $14.99 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...

  • 16x25x4 MERV 11 HVAC Air Filters

    16x25x4 MERV 11 HVAC Air Filters

    $18.99

    As Low As $14.99 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...

  • 18x24x4 MERV 11 HVAC Air Filters

    18x24x4 MERV 11 HVAC Air Filters

    $18.99

    As Low as $14.99 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,...

  • 20x20x4 MERV 11 HVAC Air Filters

    20x20x4 MERV 11 HVAC Air Filters

    $18.99

    As Low as $14.99 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,...

  • 20x24x4 MERV 11 HVAC Air Filters

    20x24x4 MERV 11 HVAC Air Filters

    $18.99

    As Low as $14.99 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,...

  • 20x25x4 MERV 11 HVAC Air Filters

    $18.99

    As Low as $14.99 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,...

  • 24x24x4 MERV 11 HVAC Air Filters

    24x24x4 MERV 11 HVAC Air Filters

    $18.99

    As Low as $14.99 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,...