• 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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20 X 20 X 4" Standard Filters

NOTE: Please compare the actual size of your current filter with the actual sizes listed on our site. A nominal 20" x 20" x 4" filter can be different actual sizes depending on the brand of your air cleaner.
Showing 1 -  7 of 7 Products
20x20x5 AIRx DUST Honeywell FC100A1011 Replacement Air Filter - MERV 8, 2-Pack
$39.98 / Filter
$49.97 Save 20%!
Ships Free!
20x20x5 AIRx ALLERGY Honeywell FC100A1011 Replacement Air Filter - MERV 11, 2-Pack
$49.98 / Filter
$62.47 Save 20%!
Ships Free!
20x20x5 AIRx HEALTH Honeywell FC100A1011 Replacement Air Filter - MERV 13, 2-Pack
$59.98 / Filter
$74.97 Save 20%!
Ships Free!
20x20x4 AIRx DUST Air Filter - MERV 8, 6-Pack
$24.99 / Filter
$31.24 Save 20%!
Ships Free!
20x20x4 AIRx ALLERGY Air Filter - MERV 11, 6-Pack
$27.83 / Filter
$34.79 Save 20%!
Ships Free!
20x20x4 AIRx HEALTH Air Filter - MERV 13, 6-Pack
$32.17 / Filter
$40.21 Save 20%!
Ships Free!
20x20x4 AIRx ODOR Air Filter - Carbon, 6-Pack
$30.83 / Filter
$38.54 Save 20%!
Ships Free!
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What Our Customers Have to Say

Harvey 1 day ago
5
The product is excellent, as is typical, but as I mentioned to "customer service" when to order was delivered the container was damaged in shipment and one filter "was injured". I will see if it fits properly when I replace the filter now in service in three months. I think I will be able to "press" the bent part into shape so that it will fit into the filter slot of the furnace but if I cannot I will request a credit to be applied to my next order for the damaged filter. Harvey Randall
Robert V. 1 day ago
5
does what's it's supposed to do, fits into system snug-not loose, constructed with sturdy materials.
Dianne H. 1 day ago
5
Wonderful products
shaheen s. 1 day ago
5
Great product! The instructions were clear and easy to follow. The filter was the perfect size, arrived on time, and the entire transaction was smooth and hassle-free. Very satisfied with my purchase and would buy again