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  • Size
      1″ Air Filters
      2″ Air Filters
      4″ Air Filters
      5″ Air Filters
      Custom Sizes
      Most Popular 1″ Air Filter Sizes Click to see all sizes >
      • 10 x 10 x 1″
      • 12 x 12 x 1″
        12 x 20 x 1″
        12 x 24 x 1″
        12 x 30 x 1″
      • 14 x 14 x 1″
        14 x 20 x 1″
        14 x 24 x 1″
        14 x 25 x 1″
        14 x 30 x 1″
      • 16 x 16 x 1″
        16 x 20 x 1″
        16 x 24 x 1″
        16 x 25 x 1″
      • 18 x 18 x 1″
        18 x 20 x 1″
        18 x 24 x 1″
        18 x 30 x 1″
      • 20 x 20 x 1″
        20 x 22 x 1″
        20 x 24 x 1″
        20 x 25 x 1″
        20 x 30 x 1″
      • 24 x 24 x 1″
        24 x 30 x 1″
      • 25 x 25 x 1″
      • 10 x 10 x 2″
      • 12 x 12 x 2″
        12 x 20 x 2″
        12 x 24 x 2″
        12 x 30 x 2″
      • 14 x 14 x 2″
        14 x 20 x 2″
        14 x 24 x 2″
        14 x 25 x 2″
        14 x 30 x 2″
      • 16 x 16 x 2″
        16 x 20 x 2″
        16 x 24 x 2″
        16 x 25 x 2″
      • 18 x 18 x 2″
        18 x 20 x 2″
        18 x 24 x 2″
        18 x 30 x 2″
      • 20 x 20 x 2″
        20 x 22 x 2″
        20 x 24 x 2″
        20 x 25 x 2″
        20 x 30 x 2″
      • 24 x 24 x 2″
        24 x 30 x 2″
      • 25 x 25 x 2″
      • 10 x 10 x 4″
      • 12 x 12 x 4″
        12 x 20 x 4″
        12 x 24 x 4″
        12 x 30 x 4″
      • 14 x 14 x 4″
        14 x 20 x 4″
        14 x 24 x 4″
        14 x 25 x 4″
        14 x 30 x 4″
      • 16 x 16 x 4″
        16 x 20 x 4″
        16 x 24 x 4″
        16 x 25 x 4″
      • 18 x 18 x 4″
        18 x 20 x 4″
        18 x 24 x 4″
        18 x 30 x 4″
      • 20 x 20 x 4″
        20 x 22 x 4″
        20 x 24 x 4″
        20 x 25 x 4″
        20 x 30 x 4″
      • 24 x 24 x 4″
        24 x 30 x 4″
      • 25 x 25 x 4″
      • 16 x 25 x 5″
      • 20 x 25 x 5″
    • Brand
        Filterbuy compatible filters for:
      • Brand Column 1
        • Air Bear
        • Air Demon
        • Air Kontrol
        • Amana
        • American Standard
        • Aprilaire
        • BDP
      • Brand Column 2
        • Bryant
        • Carrier
        • Coleman
        • Comfort Plus
        • Day and Night
        • Electro-Air
        • Emerson
      • Brand Column 3
        • Five Seasons
        • GeneralAire
        • Gibson
        • Goodman
        • Honeywell Filters
        • Lennox
        • Maytag
      • Brand Column 4
        • Nordyne
        • Payne
        • Pro1 IAQ
        • Rheem
        • Ruud
        • Skuttle Media Filters
        • Space-Gard
      • Brand Column 5
        • Totaline
        • Trane
        • Trion Air Bear
        • Ultravation
        • White Rodgers
        • York
    • Type
        image of 1 inch thick air filters offered by Filterbuy1" Air Filters
        image of 2 inch thick air filters offered by Filterbuy2" Air Filters
        image of 4 inch thick air filters offered by Filterbuy4" Air Filters
        16 by 25 by 5 replacement air filters by Filterbuy16x25x5" Air Filters
        20x25x5" Air Filters
        Custom Air Filters
        image of a rigid cell air filter offered by FilterbuyRigid Cell Filters
        image of three whole house air filters - shop replacement air filters for the homeWhole House Air Filters
      1″ Air Filters
      Most Popular 1″ Air Filters
      • 10 x 10 x 1″
      • 12 x 12 x 1″
        12 x 20 x 1″
        12 x 24 x 1″
        12 x 30 x 1″
      • 14 x 14 x 1″
        14 x 20 x 1″
        14 x 24 x 1″
        14 x 25 x 1″
        14 x 30 x 1″
      • 16 x 16 x 1″
        16 x 20 x 1″
        16 x 24 x 1″
        16 x 25 x 1″
      • 18 x 18 x 1″
        18 x 20 x 1″
        18 x 24 x 1″
        18 x 30 x 1″
      • 20 x 20 x 1″
        20 x 22 x 1″
        20 x 24 x 1″
        20 x 25 x 1″
        20 x 30 x 1″
      • 24 x 24 x 1″
        24 x 30 x 1″
      • 25 x 25 x 1″
      view all 1″ Air Filters
      2″ Air Filters
      Most Popular 2″ Air Filters
      • 10 x 10 x 2″
      • 12 x 12 x 2″
        12 x 20 x 2″
        12 x 24 x 2″
        12 x 30 x 2″
      • 14 x 14 x 2″
        14 x 20 x 2″
        14 x 24 x 2″
        14 x 25 x 2″
        14 x 30 x 2″
      • 16 x 16 x 2″
        16 x 20 x 2″
        16 x 24 x 2″
        16 x 25 x 2″
      • 18 x 18 x 2″
        18 x 20 x 2″
        18 x 24 x 2″
        18 x 30 x 2″
      • 20 x 20 x 2″
        20 x 22 x 2″
        20 x 24 x 2″
        20 x 25 x 2″
        20 x 30 x 2″
      • 24 x 24 x 2″
        24 x 30 x 2″
      • 25 x 25 x 2″
      view all 2″ Air Filters
      4″ Air Filters
      Most Popular 4″ Air Filters
      • 10 x 10 x 4″
      • 12 x 12 x 4″
        12 x 20 x 4″
        12 x 24 x 4″
        12 x 30 x 4″
      • 14 x 14 x 4″
        14 x 20 x 4″
        14 x 24 x 4″
        14 x 25 x 4″
        14 x 30 x 4″
      • 16 x 16 x 4″
        16 x 20 x 4″
        16 x 24 x 4″
        16 x 25 x 4″
      • 18 x 18 x 4″
        18 x 20 x 4″
        18 x 24 x 4″
        18 x 30 x 4″
      • 20 x 20 x 4″
        20 x 22 x 4″
        20 x 24 x 4″
        20 x 25 x 4″
        20 x 30 x 4″
      • 24 x 24 x 4″
        24 x 30 x 4″
      • 25 x 25 x 4″
      view all 4″ Air Filters
      5″ Air Filters
      • 16 x 25 x 5″
      • 20 x 25 x 5″
      Custom Sizes
      Filterbuy compatible filters for:
      • Air Bear
      • Air Demon
      • Air Kontrol
      • Amana
      • American Standard
      • Aprilaire
      • BDP
      • Bryant
      • Carrier
      • Coleman
      • Comfort Plus
      • Day and Night
      • Electro-Air
      • Emerson
      • Five Seasons
      • GeneralAire
      • Gibson
      • Goodman
      • Honeywell Filters
      • Lennox
      • Maytag
      • Nordyne
      • Payne
      • Pro1 IAQ
      • Rheem
      • Ruud
      • Skuttle Media Filters
      • Space-Gard
      • Totaline
      • Trane
      • Trion Air Bear
      • Ultravation
      • White Rodgers
      • York
      • 1″ air filters
      • 2″ air filters
      • 4″ air filters
      • 16x25x5 Air Filters
      • 20x25x5 Air Filters
      • Custom Air Filters
      • Rigid Cell Filters
      • Whole house air filters

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      Reviews from Satisfied Customers

      Review Stars
      5
      Verified Buyer

      I am so grateful to have found a quality air filter that is just the right size!

      Catie F.

      5
      Verified Buyer

      I was extremely pleased with the customer service that I received. I had purchased the wrong size filter and you guys went above and beyond in order to get me the right ones. You’ve got a customer for years to come.

      Rigoberto M.

      5
      Verified Buyer

      Awesome customer service, fast delivery. I will use them whenever I need new filters and will recommend to my friends!

      Shirley O.

      5
      Verified Buyer

      The price, delivery, and quality were all excellent. I’m happy to no longer buy from the big box stores! The recurring delivery will help me keep my A/C clean.

      Craig M.

      5
      Verified Buyer

      One of the best customer service experiences I’ve had. Great product and great service.

      C. P.

      5
      Verified Buyer

      They are fast and efficient, and the filters they provide are top quality. Their customer service is easy to reach. It just does not get any better.

      Gary S.

      5
      Verified Buyer

      They always get my filters just in time when I need them. Love it!

      Maria R.

      5
      Verified Buyer

      Very pleased with the product and the timely delivery. Saved money and I don't have to search for my odd size filters anymore!

      Robert M.

      5
      Verified Buyer

      Very easy and convenient. FilterBuy even had filter sizes for my furnace unit that I couldn’t find anywhere else. Prices are comparable to what I’d pay for the same filter at the store. With free shipping at my own custom interval, this is really unbeatable. I highly recommend for any homeowner.

      Jeremy B.

      5
      Verified Buyer

      Convenient way to purchase. Delivered on time and great choices with great prices. Definitely will purchase again. Highly recommend!

      Pamela S.

      5
      Verified Buyer

      What a fantastic and easy way to get the filters you need when you need them!

      John M.

      5
      Verified Buyer

      Very good filters, great prices and fast delivery.

      LaDon J.

      5
      Verified Buyer

      I am so grateful to have found a quality air filter that is just the right size!

      Catie F.

      5
      Verified Buyer

      I was extremely pleased with the customer service that I received. I had purchased the wrong size filter and you guys went above and beyond in order to get me the right ones. You’ve got a customer for years to come.

      Rigoberto M.

      5
      Verified Buyer

      Awesome customer service, fast delivery. I will use them whenever I need new filters and will recommend to my friends!

      Shirley O.

      5
      Verified Buyer

      The price, delivery, and quality were all excellent. I’m happy to no longer buy from the big box stores! The recurring delivery will help me keep my A/C clean.

      Craig M.

      5
      Verified Buyer

      One of the best customer service experiences I’ve had. Great product and great service.

      C. P.

      5
      Verified Buyer

      They are fast and efficient, and the filters they provide are top quality. Their customer service is easy to reach. It just does not get any better.

      Gary S.

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