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Water Filters & Air Filters Brands

Whether you’re looking to replace your inline water filter or trying to find the best air purifiers, we can help you by providing quality filters for less. Discount Filter Store offers the top filter brands, such as PUR, Honeywell, and ZeroWater to help make sure that you have worry-free water. Our helpful experts are also here to make sure you find the filter you need. Give us a call at 1-800-277-3458, and we’ll answer your filter questions from reverse osmosis water filtration systems to air humidifiers, to get you to the product you need.

20 Item(s)

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  1. DPFI20X21X5 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for White-Rodgers F825-0586 & FR1600-100 - 20 x 21 x 5 - MERV 8 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  2. DPFI20X21X5DCM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Comfort Plus - 20 x 21 x 5 - MERV 8 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $62.72 Retail Price:  $74.43
  3. DPFI20X21X5DEA Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Electro Air - 20 x 21 x 5 - MERV 8 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $62.72 Retail Price:  $74.43
  4. DPFI20X21X5DEM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Emerson - 20 x 21 x 5 - MERV 8 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $62.72 Retail Price:  $74.43
  5. DPFI20X21X5M11 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)
  6. DPFI20X21X5M11DCM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Comfort Plus - 20 x 21 x 5 - MERV 11 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $66.08 Retail Price:  $78.29
  7. DPFI20X21X5M11DEA Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Electro Air - 20 x 21 x 5 - MERV 11 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $66.08 Retail Price:  $78.29
  8. DPFI20X21X5M11DEM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Emerson - 20 x 21 x 5 - MERV 11 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $66.08 Retail Price:  $78.29
  9. DPFI20X21X5M13 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for White-Rodgers F825-0586 & FR1600-100 - 20 x 21 x 5 - MERV 13 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  10. DPFI20X21X5M13DCM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Comfort Plus - 20 x 21 x 5 - MERV 13 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $75.04 Retail Price:  $88.60
  11. DPFI20X21X5M13DEA Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Electro Air - 20 x 21 x 5 - MERV 13 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $75.04 Retail Price:  $88.60
  12. DPFI20X21X5M13DEM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Emerson - 20 x 21 x 5 - MERV 13 (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
    $75.04 Retail Price:  $88.60
  13. DPFI20X21X5OB Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for White-Rodgers F825-0586 & FR1600-100 - 20 x 21 x 5 - Carbon Filter Upgrade (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  14. DPFI20X21X5OBDCM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Comfort Plus - 20 x 21 x 5 - Carbon Filter Upgrade (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  15. DPFI20X21X5OBDEA Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Electro Air - 20 x 21 x 5 - Carbon Filter Upgrade (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  16. DPFI20X21X5OBDEM Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Emerson - 20 x 21 x 5 - Carbon Filter Upgrade (2-Pack)

    Fits White-Rodgers air cleaner models ACB1600, ACM1600 and 0121-018200 Learn More
  17. DPFL20X21X5 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Lennox X8790 - 20 x 21 x5 - MERV 8 (2-Pack)

    Fits Lennox Pure Air model number PCO14-23 Learn More
    $52.64 Retail Price:  $62.84
  18. DPFL20X21X5M11 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Lennox X8790 - 20 x 21 x5 - MERV 11 (2-Pack)

    Fits Lennox Pure Air model number PCO14-23 Learn More
    $61.60 Retail Price:  $73.14
  19. DPFL20X21X5M13 Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

    Tier1 brand replacement for Lennox X8790 - 20 x 21 x5 - MERV 13 (2-Pack)

    Fits Lennox Pure Air model number PCO14-23 Learn More
    $68.32 Retail Price:  $80.87
  20. DPFL20X21X5OB Tier1 Replacement Air Filter - 20X21X5 (2-Pack)

20 Item(s)

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