4 Inch Air Filters

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, the...

Nominal size 17" x 26" x 4" (Actual size 16 5/8" x 26" x 4 1/8"). Accumulair Filter for Lennox models X6664, X6666, and X7574 Fits Lennox model # ...

16x20x4 (15 1/2 x 19 1/2 x 3 3/4)White-Rodgers Part #FR1600M-108 and FR1600M-111 Great for reducing airborne particles such as dust, pollen, mold ...

16x25x4 (15 1/2 x 24 1/2 x 3 3/4)White-Rodgers Part #FR1400M-108 and FR1400M-111 Great for reducing airborne particles such as dust, pollen, mold ...

20x20x4 (19 1/2 x 19 1/2 x 3 3/4)White-Rodgers Part #FR1600M-108 and FR1600M-111 Great for reducing airborne particles such as dust, pollen, mold ...

20x25x4 (19 1/2 x 24 1/2 x 3 3/4)White-Rodgers Part # FR2000M-108 and FR2000M-111 Great for reducing airborne particles such as dust, pollen, mold...