• 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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18x20x4 Filters

Showing 1 -  2 of 2 Products
18x20x4 AIRx DUST Air Filter - MERV 8
$23.61 / Filter
$29.51 Save 20%!
6 Pack Selected
$141.64
Ships Free!
18x20x4 AIRx ALLERGY Air Filter - MERV 11
$25.21 / Filter
$31.51 Save 20%!
6 Pack Selected
$151.25
Ships Free!
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What Our Customers Have to Say

debra k. 1 day ago
5
First of all the last time I ordered it it took almost 2 weeks to get to me. I honestly was not going to order it again, but I did, but I think they’re good filters. This one came in just a couple of days so that was great. They say that their medical filters or something I’m not quite sure what that means but yet they don’t look many much different from the regular filters but they do last long almost 3 months. I can keep one in the price is fantastic
Christopher 5 days ago
5
They trap the dust extremely well and fit great good product
Paula V. 6 days ago
5
It’s the only air filter we use. It traps forest fire smoke really well and I will do an early change out when needed.
jerome c. 6 days ago
5
Excellent product