Lennox Compatible Air Filter Replacements

Filterbuy replacement air filters offer the same high quality materials and performance as the name brand but at a fraction of the cost.

  • Available in MERV 8, 11, and 13
  • Free shipping
  • Guaranteed to fit
  • Lowest prices
  • Made in the U.S.A.
  • Family owned and operated

Customer Review

"Absolutely the best and most efficient way to purchase furnace filters! No problem finding the filter I needed, filters delivered within a couple of days, fit perfectly and shipping is FREE! What's not to like?"-Christine P.
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16x25x3 MERV 8 16x25x3 MERV 11 16x25x3 MERV 13

Actual: 15 3/4 x 24 1/4 x 3"

Designed to Fit:
X0581 X5427

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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16x20x5 MERV 8 16x20x5 MERV 11 16x20x5 MERV 13

Actual: 16 x 20 x 4 1/4"

Designed to Fit:
X0582

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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16x25x5 MERV 8 16x25x5 MERV 11 16x25x5 MERV 13

Actual: 15.75 x 24.75 x 4.38"

Designed to Fit:
X0583 X6670 HCF16-10

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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17x26x4 MERV 8 17x26x4 MERV 11 17x26x4 MERV 13

Actual: 16 1/2 x 26 x 4 1/8"

Designed to Fit:
75x74 x6664 x6666

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x20x5 MERV 8 20x20x5 MERV 11 20x20x5 MERV 13

Actual: 19 3/4 x 19 7/8 x 4 3/8"

Designed to Fit:
X0585 X8305 X8308

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x21x5 MERV 8 20x21x5 MERV 11 20x21x5 MERV 13

Actual: 20 x 20 6/3 x 4 3/8"

Designed to Fit:
X8790

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x25x5 MERV 8 20x25x5 MERV 11 20x25x5 MERV 13

Actual: 19.88 x 24.75 x 4.38"

Designed to Fit:
X0586 X6673 X5426

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x26x3 MERV 8 20x26x3 MERV 11 20x26x3 MERV 13

Actual: 20 1/8 x 26 x 3"

Designed to Fit:
x1184

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x26x5 MERV 8 20x26x5 MERV 11 20x26x5 MERV 13

Actual: 20x25.88x4.88"

Designed to Fit:
X0587 X5428

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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16x28x6 MERV 8 16x28x6 MERV 11 16x28x6 MERV 13

Actual: 15.28 x 26 15/16 x 6"

Designed to Fit:
X1444 X4559 X5425

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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20x25x6 MERV 8 20x25x6 MERV 11 20x25x6 MERV 13

Actual: 19 3/4 x 24 1/2 x 6 3/8"

Designed to Fit:
X0445 X4560 X5424

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

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