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21x23x1 Air Filter

In need of a 21x23x1 air filter? Choose from four different MERV ratings and two package bundles to customize your order to your exact preferences for your home or business. Each filter can be used for your AC vent or furnace, and we offer free shipping and a price match guarantee on every order. Use our chat feature or give us a call at +1 (877) 492-3018 for any questions.
  • Home Basic

    Fiberglass | MERV Rating 6
    21 x 23 x 1 MERV 6 Fiberglass Air Filter
    Get your First Filter Free with Auto Delivery
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    • Actual Size: 20 7/8" x 22 7/8" x 3/4"
    • Product #: D50S.012123
  • Home Select

    Pleated | MERV Rating 8
    21 x 23 x 1 MERV 8 Pleated Air Filter
    Get your First Filter Free with Auto Delivery
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    • Actual Size: 20 7/8" x 22 7/8" x 3/4"
    • Product #: P80S.012123
  • Home Plus

    Pleated | MERV Rating 11
    21 x 23 x 1 MERV 11 Pleated Air Filter
    Get your First Filter Free with Auto Delivery
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    • Actual Size: 20 7/8" x 22 7/8" x 3/4"
    • Product #: P15S.012123
  • Home Ultimate

    Pleated | MERV Rating 13
    21 x 23 x 1 MERV 13 Pleated Air Filter
    Get your First Filter Free with Auto Delivery
    View Terms and Conditions
    • Actual Size: 20 7/8" x 22 7/8" x 3/4"
    • Product #: P25S.012123
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