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Furnace & HVAC Filters

Furnace & HVAC Filters

Shop furnace and HVAC replacement filters for residential and light-commercial heating and cooling systems. Furnace Part Source carries standard and high-efficiency filters by size, MERV rating, and equipment model to help support airflow and indoor air quality.

Use the product list below to find the correct filter by dimensions, MERV rating, or equipment model. Always confirm filter size and airflow direction before ordering to help ensure proper fit and performance.

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    Carrier KH680002 5/8" Liquid Line Drier Filter

    Carrier

    MSRP: $1,117.89
    Now: $846.89
    Carrier KH680002 5/8" Liquid Line Drier Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $1,117.89
    Now: $846.89
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    Trane # FLR6455 Filer IFD Pack of 2

    Trane

    MSRP: $733.51
    Now: $566.80
    Trane # FLR6455 Filer IFD Pack of 2   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements
    MSRP: $733.51
    Now: $566.80
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    Siemens AQF3101 Filter

    Siemens

    MSRP: $54.00
    Now: $40.91
    Siemens AQF3101 Filter  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $54.00
    Now: $40.91
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    Siemens 908-052 Replacement Filter Element

    Siemens Building Technology

    MSRP: $185.28
    Now: $143.17
    Siemens 908-052 Replacement Filter Element   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $185.28
    Now: $143.17
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    MSRP: $185.28
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    Heil Quaker 741010039 Filter Wrapper

    Heil Quaker

    MSRP: $34.09
    Now: $25.83
    Heil Quaker 741010039 Filter Wrapper  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements Cross...
    MSRP: $34.09
    Now: $25.83
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    MSRP: $34.09
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    Heil Quaker 1171652 Filter 21.5 X 16.3 75 X 1

    International Comfort Products

    MSRP: $46.98
    Now: $36.30
    Heil Quaker 1171652 Filter 21.5 X 16.3 75 X 1  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements ...
    MSRP: $46.98
    Now: $36.30
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    Nordyne 918759 Hepa Fitler

    Nordyne

    MSRP: $83.69
    Now: $64.67
    Nordyne 918759 Hepa Fitler  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements Cross References
    MSRP: $83.69
    Now: $64.67
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    MSRP: $83.69
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    Nordyne 918737 Hepa Filter 20X22X5 Merv 11

    Nordyne

    MSRP: $81.10
    Now: $62.67
    Nordyne 918737 Hepa Filter 20X22X5 Merv 11  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements Cross...
    MSRP: $81.10
    Now: $62.67
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    MSRP: $81.10
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    Nordyne 918397 Merv 11 Media Filter

    Nordyne

    MSRP: $72.09
    Now: $55.70
    Nordyne 918397 Merv 11 Media Filter  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements Cross...
    MSRP: $72.09
    Now: $55.70
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    MSRP: $72.09
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    Nordyne 917763 MetalMeshFilter 16x19 Single

    Nordyne

    MSRP: $33.35
    Now: $25.77
    Nordyne 917763 MetalMeshFilter 16x19 Single   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $33.35
    Now: $25.77
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    MSRP: $33.35
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    Robertshaw 11-201 Water Filter

    Robertshaw

    MSRP: $37.44
    Now: $28.36
    Robertshaw 11-201 Water Filterl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements   Cross...
    MSRP: $37.44
    Now: $28.36
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    MSRP: $37.44
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    Honeywell HRF-F1 Universal Hepa Air Filter

    Honeywell

    MSRP: $71.56
    Now: $54.21
    Honeywell HRF-F1 Universal Hepa Air Filterl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $71.56
    Now: $54.21
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    MSRP: $71.56
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    Honeywell HRF-D1 Universal Hepa Filter

    Honeywell

    MSRP: $83.01
    Now: $64.14
    Honeywell HRF-D1 Universal Hepa Filter FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $83.01
    Now: $64.14
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    MSRP: $83.01
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    Honeywell HRF-C2 Hepa Clean Repl. Filter; 2Pk

    Honeywell

    MSRP: $42.30
    Now: $32.46
    Honeywell HRF-C2 Hepa Clean Repl. Filter; 2Pkl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $42.30
    Now: $32.46
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    MSRP: $42.30
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    Honeywell HRF-C1 Replacement Hepa Filter C

    Honeywell

    MSRP: $49.05
    Now: $37.91
    Honeywell HRF-C1 Replacement Hepa Filter Cl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $49.05
    Now: $37.91
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    MSRP: $49.05
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    Honeywell HRF-APP1 Premium Universal Pre-Filter

    Honeywell

    MSRP: $24.90
    Now: $19.24
    Honeywell HRF-APP1 Premium Universal Pre-Filterl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $24.90
    Now: $19.24
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    MSRP: $24.90
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    Honeywell HC-811 Replacement Humidifier Filter

    Honeywell

    MSRP: $11.47
    Now: $8.70
    Honeywell HC-811 Replacement Humidifier Filterl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $11.47
    Now: $8.70
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    MSRP: $11.47
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    Honeywell FC200E1029 16X25 Ultra Replc Filter Merv 13

    Resideo

    MSRP: $85.59
    Now: $66.13
    Honeywell FC200E1029 16X25 Ultra Replc Filter Merv 13l Item is Non Cancelable / Non Returnable FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New...
    MSRP: $85.59
    Now: $66.13
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    MSRP: $85.59
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    Honeywell FC200E1003 16X20 Ultra Replacement Filter

    Resideo

    MSRP: $86.97
    Now: $67.21
    Honeywell FC200E1003 16X20 Ultra Replacement Filterl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $86.97
    Now: $67.21
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    MSRP: $86.97
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Furnace & HVAC Filters

Air filters remove dust, debris, and particulates from the air moving through a furnace or HVAC system, protecting internal components while supporting indoor air quality. A clogged or incorrectly sized filter can restrict airflow and reduce system efficiency.

Furnace Part Source carries a selection of furnace and HVAC filters in standard sizes and MERV ratings for residential and light-commercial equipment.

Common Filter Types We Carry

Common filter options include:

  • Standard pleated filters for everyday dust and debris capture.
  • Higher MERV-rated filters for improved filtration of finer particles.
  • Equipment-specific filters sized for particular furnace or air handler models.

How to Find the Right Filter

Before ordering, confirm the exact filter dimensions (length, width, and depth) either from the existing filter or the equipment's filter slot. Also check the recommended MERV rating for your system, since some HVAC equipment has airflow limitations that restrict how high a MERV rating can be used.

For best fit, compare:

  • Filter dimensions (length x width x depth)
  • MERV rating
  • Airflow direction arrow on the filter frame
  • Equipment model, if using an OEM-specific filter

Replacing Your Furnace or HVAC Filter

Regular filter replacement helps maintain airflow, protect the blower motor, and support consistent indoor air quality. Check filters monthly and replace them according to the manufacturer's recommended schedule or sooner if visibly dirty.

Need Help Choosing a Filter?

Not sure which filter size or MERV rating you need? Check the existing filter or the filter slot in your equipment, or contact Furnace Part Source for help identifying the correct replacement.

HVAC Filter FAQs

How often should I change my furnace filter?

Most furnace filters should be checked monthly and replaced every one to three months, depending on usage, filter type, and household conditions such as pets or allergies.

What does MERV rating mean?

MERV (Minimum Efficiency Reporting Value) measures how effectively a filter captures particles. Higher MERV ratings capture smaller particles but may increase airflow resistance, so confirm your system supports the rating you choose.

Can a dirty filter damage my furnace?

Yes. A clogged filter restricts airflow, which can cause the system to overheat, reduce efficiency, and place added strain on the blower motor and heat exchanger.

Which way does the airflow arrow on a filter go?

The airflow arrow should point in the direction air travels through the system, typically toward the blower or air handler. Installing a filter backward can reduce filtration efficiency.