• Spend $70 or more and your order ships free! We'll get your filters out the door fast so you can enjoy clean air and water.*

    * Orders under $70 ship for $5.99.

  • 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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  • Spend $70 or more and your order ships free! We'll get your filters out the door fast so you can enjoy clean air and water.*

    * Orders under $70 ship for $5.99.

  • 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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Trane 21 x 21 x 5" BAYFTDN21M



What Our Customers Have to Say

Philip K. 1 day ago
5
These filters are high quality and fit perfectly in my Lenox A /C unit. I’ve been using Filter Buy for several years now and have been pleased with the quality, fit and value! I’ve installed additional filters in the return vents through the house to “double filter” the air. I think that having these additional “pre-filters “ should extend the life of the primary filter in my A/C unit.
BRUCE 1 day ago
5
I like these filters, been using them for a while.
Theresa H. 1 day ago
5
Excellent value and excellent product
Linda G. 2 days ago
5
I always buy my AC filters from Discount Filters. Best price foe quality products. Highly recommend! 5 STARS