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21 x 21 x 1

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    Fiberglass | MERV Rating 6
    21 x 21 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 20 7/8" x 3/4"
    • Product #: D50S.012121
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    Pleated | MERV Rating 8
    21 x 21 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 20 7/8" x 3/4"
    • Product #: P80S.012121
  • Home Plus

    Pleated | MERV Rating 11
    21 x 21 x 1 MERV 11 Pleated Air Filter
    Get your First Filter Free with Auto Delivery
    View Terms and Conditions
    • Actual Size: 20 7/8" x 20 7/8" x 3/4"
    • Product #: P15S.012121
  • Home Ultimate

    Pleated | MERV Rating 13
    21 x 21 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 20 7/8" x 3/4"
    • Product #: P25S.012121

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