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4 Inch Filters

  • 12x24x4 MERV 13 HVAC Air Filters

    12x24x4 MERV 13 HVAC Air Filters

    $22.99

      As Low As $17.99 Per Filter!   12 x 24 x 4 HVAC Air Filter.   Actual Size: 11-1/2 x 23-1/2 x 3-3/4.   Filter Rating: MERV 13 | FPR 10 | MPR 2200.   Protects: Pollen, dirt, dust, pet dander, viruses, smoke,...

  • 18x24x4 MERV 13 HVAC Air Filters

    18x24x4 MERV 13 HVAC Air Filters

    $24.99

    As Low as $19.99 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,...

  • 20x24x4 MERV 13 HVAC Air Filters

    20x24x4 MERV 13 HVAC Air Filters

    $24.99

    As Low as $19.99 per Filter! 20 x 24 x 4 HVAC Air Filter.  Actual Size: 19-3/8 x 23-3/8 x 3-3/4.  Filter Rating: MERV 13 | FPR 10 | MPR 2200.  Protects: Pollen, dirt, dust, pet dander, viruses, smoke, smog, lead dust,...