• No minimums, no surprises — we ship every order for free! We’ll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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  • No minimums, no surprises — we ship every order for free! We’ll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

Cart 0

We don't know what's in your water,
but we know there's nothing in your cart.

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12x24x4 Filters

Showing 1 -  3 of 3 Products
12x24x4 AIRx ALLERGY Air Filter - MERV 11
$14.51 / Filter
$18.14 Save 20%!
6 Pack Selected
$87.08
Ships Free!
12x24x4 AIRx DUST Air Filter - MERV 8
$12.55 / Pc
$15.68 Save 20%!
6 Pack Selected
$75.27
Ships Free!
12x24x4 AIRx HEALTH Air Filter - MERV 13
$28.71 / Filter
$35.88 Save 20%!
6 Pack Selected
$172.23
Ships Free!
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What Our Customers Have to Say

Keith B. 1 day ago
5
Irregular size for our two condo HVAC units. Had to order online as not in stock at Lowes or Home Depot, so Discount Filters was the best value and the most readily available.
Keith B. 1 day ago
5
Standard size for our home HVAC units. Three intake filters in our house. Good air quality for pet dander, dust and allergens. Good value.
Ray G. 3 days ago
5
Great filter. Reasonable price. Filters all I need for it to do.
Norbert S. 4 days ago
5
Been buying these 8 merv filters for quite a few years. They work fine and don't put a strain on my ac unit. Does a good job.