13 x 21½ x 1"

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13x21.5x1 AIRx ALLERGY Air Filter, 6-Pack
$14.49 / Filter
$18.11 Save 20%!
6 Pack Selected
$86.94
Ships Free!
13x21.5x1 AIRx ALLERGY Air Filter, 12-Pack
$13.49 / Filter
$16.86 Save 20%!
12 Pack Selected
$161.88
Ships Free!
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What Our Customers Have to Say

jeff 1 day ago
5
The filters fit perfectly. I got merv e11 instead of merv, 8. The lower filter is 16×25×1 which I have a picture of the cover in the ceiling. The other are 14×14×1 i got Merv 11 the pure lighter was merv 8
Pam 1 day ago
5
I like that these furnace filters are made well. I purchased this brand a couple years ago. Decided to try a few other brands, one online company and two from local hardware stores. I eventually realized that although we don’t necessarily see the difference or realize if they are doing a good job since they are out of site doing their jib. The filters by DiscountFilter were made better, more support-both sides, and more fan folds doing the job. I have gone back to buying from Discount Filter. I would recommend this brand. They arrived quickly, were packaged well, and the price was comparable to other brands.
Elena P. 2 days ago
5
I use these filters for my downstairs and upstairs air conditioning units. The best for my home use.
Elena P. 2 days ago
5
I always use a certified water filter and these are the best.