AirFilters.com: furnace, AC and cabin filters made in the USA

Shopping at AirFilters.com? See all current AirFilters.com discount codes and deals, checked regularly.

AirFilters.com is a filter specialist based in Durham, North Carolina. It sells replacement filters for furnaces, air conditioners, heat pumps and whole-house systems, and it says it carries more than 3,000 standard sizes, made in the USA. It also has cabin air filters for trucks and SUVs, plus a custom filter service for odd sizes.

It suits homeowners who know the size printed on their old filter and just want the right replacement without a trip to the hardware store. You can shop by size, by thickness (1", 2", 4" and 5" and up) or by the brand of your HVAC system, from Honeywell and Lennox to Carrier, Trion Air Bear and York.

What's worth a look

Here are six filters from across the range, from everyday 1" filters to deep-pleat whole-house ones.

16 x 25 x 1 Air FilterCommon 1" home size, 4-pack, choose your MERV$39.84View at AirFilters.com 20 x 25 x 2 Air Filter2" pleated filters in a 6-pack$71.76View at AirFilters.com 20 x 25 x 4 Air Filter4" deep filters in a 3-pack$59.88View at AirFilters.com 16x25x5 (15.88 x 24.88 x 4.38) MERV 13 Accumulair Replacement Filter for Honeywell and LennoxWhole-house 2-pack for allergy sufferers$119.92View at AirFilters.com 16x25x5 (15.88 x 24.88 x 4.38) MERV 8 Accumulair Replacement Filter for HoneywellWhole-house 2-pack for dust, pollen and pet dander$79.92View at AirFilters.com Dust Armor CAFDA-F01 Cabin Air FilterReplaces Ford FP79; fits F-150 and Expedition$24.97View at AirFilters.com

Standard sizes come in multipacks and let you pick a MERV rating before you add them to your cart, so the price shown is the lowest option. The 16 x 25 x 1 filter, one of the most common home sizes, starts at $39.84 for a 4-pack. If you have a whole-house system with a 5" media cabinet, the Accumulair MERV 13 replacement for Honeywell and Lennox is $119.92 for a 2-pack and is rated to capture 90%+ of particles between 1.0 and 3.0 microns, which makes it a good pick for allergy sufferers. The store says it lasts up to 12 months.

Each product page lists the actual measurements as well as the nominal size, which is worth checking: a "16 x 25 x 1" filter actually measures 15 3/4" x 24 3/4" x 3/4". You can also browse every size by thickness. Custom washable and metal mesh filters are made to order and quoted by phone. For your car, the Dust Armor cabin filters are $24.97 each and are listed by the part they replace, such as Ford FP79 or GM 13508023.

Current offers

• Save 10% on air filter subscriptions, which send your filters on a schedule.
• Free shipping on orders over $99.

Both offers are shown across the top of the site. There's no wider sale on right now.

How to save more

• Set up a subscription for the filters you replace regularly. You get 10% off every order and don't have to remember when the next change is due.
• Buy a bigger pack, or add a cabin filter for your car, to get past $99 and qualify for free shipping.
• Match the MERV rating to your needs. MERV 8 filters handle dust, pollen and pet dander for less money, while MERV 13 adds smoke, smog and finer particles.

Products, prices and offers checked on the store's own website on 4 Nov 2026. Prices and stock can change.

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