Discount Water Filters and Air Filters at Discount Filter Store.com

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
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Learn more about our No Worries Guarantee

Air Conditioner & Furnace Air Filters By Brand

Whether you’re looking for one air conditioner/ furnace filter to replace your old dirty one or to stock up on furnace air filters, Discount Filter Store can help, by providing you with more, for less.  We offer air conditioner filters from some of the industry’s top manufacturers including 3M Filtrete, Bryant, Aprilaire, Honeywell, and more.

Not sure which filter is right for your home?  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 all your air filter questions.

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  • TIER1-DPFI16X20X4M11

    TIER1-DPFI16X20X4M11

    $35.28
    MSRP: $42.87
    Save 18%
  • TIER1-DPFI16X21X5M11

    TIER1-DPFI16X21X5M11

    $60.47
    MSRP: $71.84
    Save 16%
  • TIER1-DPFI16X21X5M11DCM

    TIER1-DPFI16X21X5M11DCM

    $60.47
    MSRP: $71.84
    Save 16%
  • TIER1-DPFI16X21X5M11DEA

    TIER1-DPFI16X21X5M11DEA

    $60.47
    MSRP: $71.84
    Save 16%
  • TIER1-DPFI16X21X5M11DEM

    TIER1-DPFI16X21X5M11DEM

    $60.47
    MSRP: $71.84
    Save 16%
  • TIER1-DPFI16X25X4M11

    TIER1-DPFI16X25X4M11

    $40.31
    MSRP: $48.66
    Save 17%
  • TIER1-DPFI16X26X5M11

    TIER1-DPFI16X26X5M11

    $53.72
    MSRP: $64.08
    Save 16%
  • TIER1-DPFI16X26X5M11DCM

    TIER1-DPFI16X26X5M11DCM

    $53.72
    MSRP: $64.08
    Save 16%
  • TIER1-DPFI16X26X5M11DEA

    TIER1-DPFI16X26X5M11DEA

    $53.72
    MSRP: $64.08
    Save 16%
  • TIER1-DPFI16X26X5M11DEM

    TIER1-DPFI16X26X5M11DEM

    $53.72
    MSRP: $64.08
    Save 16%
  • TIER1-DPFI16X26X5M11DLX

    TIER1-DPFI16X26X5M11DLX

    $62.68
    MSRP: $74.38
    Save 16%
  • TIER1-DPFI20X20X4M11

    TIER1-DPFI20X20X4M11

    $38.07
    MSRP: $46.08
    Save 17%
  • TIER1-DPFI20X21X5M11
  • TIER1-DPFI20X21X5M11DCM

    TIER1-DPFI20X21X5M11DCM

    $66.08
    MSRP: $78.29
    Save 16%
  • TIER1-DPFI20X21X5M11DEA

    TIER1-DPFI20X21X5M11DEA

    $66.08
    MSRP: $78.29
    Save 16%
  • TIER1-DPFI20X21X5M11DEM

    TIER1-DPFI20X21X5M11DEM

    $66.08
    MSRP: $78.29
    Save 16%
  • TIER1-DPFI20X25X4M11

    TIER1-DPFI20X25X4M11

    $42.12
    MSRP: $44.79
    Save 6%
  • TIER1-DPFI20X25X5M11

    TIER1-DPFI20X25X5M11

    $55.44
    MSRP: $66.06
    Save 16%
  • TIER1-DPFI20X26X5M11

    TIER1-DPFI20X26X5M11

    $55.96
    MSRP: $66.65
    Save 16%
  • TIER1-DPFI20X26X5M11DCM

    TIER1-DPFI20X26X5M11DCM

    $55.96
    MSRP: $66.65
    Save 16%
  • TIER1-DPFI20X26X5M11DEA

    TIER1-DPFI20X26X5M11DEA

    $55.96
    MSRP: $66.65
    Save 16%
  • TIER1-DPFI20X26X5M11DEM

    TIER1-DPFI20X26X5M11DEM

    $55.96
    MSRP: $66.65
    Save 16%
  • TIER1-DPFI20X26X5M11DLX

    TIER1-DPFI20X26X5M11DLX

    $62.68
    MSRP: $74.38
    Save 16%
  • TIER1-DPFL16X26X5M11

    TIER1-DPFL16X26X5M11

    $61.60
    MSRP: $73.14
    Save 16%
  • TIER1-DPFL20X21X5M11

    TIER1-DPFL20X21X5M11

    $61.60
    MSRP: $73.14
    Save 16%
  • TIER1-DPFL20X26X5M11

    TIER1-DPFL20X26X5M11

    $61.60
    MSRP: $73.14
    Save 16%
  • TIER1-DPFPC16X25X5M11

    TIER1-DPFPC16X25X5M11

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC16X25X5M11D5S

    TIER1-DPFPC16X25X5M11D5S

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DBP

    TIER1-DPFPC16X25X5M11DBP

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DBT

    TIER1-DPFPC16X25X5M11DBT

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DCL

    TIER1-DPFPC16X25X5M11DCL

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DDN

    TIER1-DPFPC16X25X5M11DDN

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC16X25X5M11DEA

    TIER1-DPFPC16X25X5M11DEA

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DGB

    TIER1-DPFPC16X25X5M11DGB

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC16X25X5M11DPN

    TIER1-DPFPC16X25X5M11DPN

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC16X25X5M11DTL

    TIER1-DPFPC16X25X5M11DTL

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC16X25X5M11DYO

    TIER1-DPFPC16X25X5M11DYO

    $60.44
    MSRP: $71.81
    Save 16%
  • TIER1-DPFPC20X20X5M11

    TIER1-DPFPC20X20X5M11

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11D5S

    TIER1-DPFPC20X20X5M11D5S

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DBP

    TIER1-DPFPC20X20X5M11DBP

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DBT

    TIER1-DPFPC20X20X5M11DBT

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DCL

    TIER1-DPFPC20X20X5M11DCL

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DDN

    TIER1-DPFPC20X20X5M11DDN

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DEA

    TIER1-DPFPC20X20X5M11DEA

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DGB

    TIER1-DPFPC20X20X5M11DGB

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DPN

    TIER1-DPFPC20X20X5M11DPN

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DTL

    TIER1-DPFPC20X20X5M11DTL

    $58.20
    MSRP: $69.23
    Save 16%
  • TIER1-DPFPC20X20X5M11DYO

    TIER1-DPFPC20X20X5M11DYO

    $58.20
    MSRP: $69.23
    Save 16%

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