Air filters
Products
Shop pleated replacement air filters by size, depth, and MERV rating.
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21-5x24x2 MERV 8 Air Filter
Regular price From $3.22 USDRegular price$16.08 USDSale price From $3.22 USDSale -
21-5x24x4 MERV 11 Air Filter
Regular price From $5.77 USDRegular price$28.83 USDSale price From $5.77 USDSale -
21-5x24x4 MERV 13 Air Filter
Regular price From $6.77 USDRegular price$33.83 USDSale price From $6.77 USDSale -
21-5x24x4 MERV 8 Air Filter
Regular price From $4.52 USDRegular price$22.58 USDSale price From $4.52 USDSale -
21-5x26x1 MERV 11 Air Filter
Regular price From $3.67 USDRegular price$18.33 USDSale price From $3.67 USDSale -
21-5x26x1 MERV 13 Air Filter
Regular price From $4.32 USDRegular price$21.58 USDSale price From $4.32 USDSale -
21-5x26x1 MERV 8 Air Filter
Regular price From $3.40 USDRegular price$16.99 USDSale price From $3.40 USDSale -
21-5x26x2 MERV 11 Air Filter
Regular price From $4.02 USDRegular price$20.08 USDSale price From $4.02 USDSale -
21-5x26x2 MERV 13 Air Filter
Regular price From $4.92 USDRegular price$24.58 USDSale price From $4.92 USDSale -
21-5x26x2 MERV 8 Air Filter
Regular price From $3.02 USDRegular price$15.08 USDSale price From $3.02 USDSale -
21-5x26x4 MERV 11 Air Filter
Regular price From $5.77 USDRegular price$28.83 USDSale price From $5.77 USDSale -
21-5x26x4 MERV 13 Air Filter
Regular price From $6.77 USDRegular price$33.83 USDSale price From $6.77 USDSale -
21-5x26x4 MERV 8 Air Filter
Regular price From $4.52 USDRegular price$22.58 USDSale price From $4.52 USDSale -
21.5x23.5x1 MERV 13 Bryant / Carrier Fan Coil Filter
Regular price From $4.07 USDRegular price$20.33 USDSale price From $4.07 USDSale -
21.5x23.5x1 MERV 13 Bryant / Carrier Fan Coil Filter
Regular price From $4.07 USDRegular price$20.33 USDSale price From $4.07 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 11 Fan Coil Filter
Regular price From $2.72 USDRegular price$13.59 USDSale price From $2.72 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 11 Fan Coil Filter
Regular price From $2.72 USDRegular price$13.59 USDSale price From $2.72 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 8 Fan Coil Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 8 Fan Coil Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 8 Fan Coil Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21.5x23.5x1 Bryant / Carrier MERV 8 Fan Coil Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21x21x1 MERV 11 Air Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21x21x1 MERV 13 Air Filter
Regular price From $3.52 USDRegular price$17.58 USDSale price From $3.52 USDSale -
21x21x1 MERV 8 Air Filter
Regular price From $2.00 USDRegular price$9.99 USDSale price From $2.00 USDSale -
21x21x2 MERV 11 Air Filter
Regular price From $3.75 USDRegular price$18.74 USDSale price From $3.75 USDSale -
21x21x2 MERV 13 Air Filter
Regular price From $4.72 USDRegular price$23.58 USDSale price From $4.72 USDSale -
21x21x2 MERV 8 Air Filter
Regular price From $3.32 USDRegular price$16.58 USDSale price From $3.32 USDSale -
21x21x4 MERV 11 Air Filter
Regular price From $6.10 USDRegular price$30.49 USDSale price From $6.10 USDSale -
21x21x4 MERV 13 Air Filter
Regular price From $7.47 USDRegular price$37.33 USDSale price From $7.47 USDSale -
21x21x4 MERV 8 Air Filter
Regular price From $5.72 USDRegular price$28.58 USDSale price From $5.72 USDSale -
21x21x4.5 MERV 11 Rheem RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $9.05 USDRegular price$45.24 USDSale price From $9.05 USDSale -
21x21x4.5 MERV 11 Ruud RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $8.16 USDRegular price$40.81 USDSale price From $8.16 USDSale -
21x21x4.5 MERV 13 Replacement Filter Ruud RXFH-E21AM10, RXFH-E21AM13
Regular price From $10.06 USDRegular price$50.28 USDSale price From $10.06 USDSale -
21x21x4.5 MERV 13 Rheem RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $10.90 USDRegular price$54.49 USDSale price From $10.90 USDSale -
21x21x4.5 MERV 8 Rheem RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $8.05 USDRegular price$40.24 USDSale price From $8.05 USDSale -
21x21x4.5 MERV 8 Rheem RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $8.05 USDRegular price$40.24 USDSale price From $8.05 USDSale -
21x21x4.5 MERV 8 Ruud RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $7.13 USDRegular price$35.67 USDSale price From $7.13 USDSale -
21x21x4.5 MERV 8 Ruud RXFH-E21AM10, RXFH-E21AM13 Replacement Filter
Regular price From $7.13 USDRegular price$35.67 USDSale price From $7.13 USDSale -
21x22x1 MERV 11 Air Filter
Regular price From $2.97 USDRegular price$14.83 USDSale price From $2.97 USDSale -
21x22x1 MERV 13 Air Filter
Regular price From $4.17 USDRegular price$20.83 USDSale price From $4.17 USDSale -
21x22x1 MERV 8 Air Filter
Regular price From $2.08 USDRegular price$10.41 USDSale price From $2.08 USDSale -
21x22x2 MERV 11 Air Filter
Regular price From $4.72 USDRegular price$23.58 USDSale price From $4.72 USDSale -
21x22x2 MERV 13 Air Filter
Regular price From $6.92 USDRegular price$34.58 USDSale price From $6.92 USDSale -
21x22x2 MERV 8 Air Filter
Regular price From $3.42 USDRegular price$17.08 USDSale price From $3.42 USDSale -
21x22x4 MERV 11 Air Filter
Regular price From $6.22 USDRegular price$31.08 USDSale price From $6.22 USDSale -
21x22x4 MERV 13 Air Filter
Regular price From $7.32 USDRegular price$36.58 USDSale price From $7.32 USDSale -
21x22x4 MERV 8 Air Filter
Regular price From $4.87 USDRegular price$24.33 USDSale price From $4.87 USDSale -
21x23-25x1 MERV 11 Air Filter
Regular price From $3.15 USDRegular price$15.74 USDSale price From $3.15 USDSale -
21x23-25x1 MERV 13 Air Filter
Regular price From $4.42 USDRegular price$22.08 USDSale price From $4.42 USDSale -
21x23-25x1 MERV 8 Air Filter
Regular price From $2.77 USDRegular price$13.83 USDSale price From $2.77 USDSale
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Looking for more?
Browse additional depths, sizes, and MERV ratings for the exact replacement filter you need.
Choosing A MERV Rating
MERV 8 is a common residential choice for dust and pollen. MERV 11 and MERV 13 add stronger particle capture for homes that need higher filtration.
How do I find my filter size?
Check the size printed on the existing filter frame, then compare the nominal size with the actual dimensions when available.