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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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    Honeywell FC100A1052 20X12.5 Replacement Filter

    Resideo

    MSRP: $54.73
    Now: $42.29
    Honeywell FC100A1052 20X12.5 Replacement Filterl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $54.73
    Now: $42.29
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    MSRP: $54.73
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    Honeywell FC100A1045 21.5X27.5 Replacement Filter

    Resideo

    MSRP: $54.73
    Now: $42.29
    Honeywell FC100A1045 21.5X27.5 Replacement Filterl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $54.73
    Now: $42.29
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    Honeywell 24000 99.97% Hepa filt for 300Cfmw/Ocpz

    Honeywell

    MSRP: $189.73
    Now: $146.61
    Honeywell 24000 99.97% Hepa filt for 300Cfmw/Ocpzl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $189.73
    Now: $146.61
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    MSRP: $189.73
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    Honeywell 202614 F90 Carbon Filter

    Honeywell

    MSRP: $48.10
    Now: $37.17
    Honeywell 202614 F90 Carbon Filterl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $48.10
    Now: $37.17
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    MSRP: $48.10
    Now: $37.17
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    Rheem 68-101807-04 24" 10 Row Plastic Filter

    Rheem-Ruud

    MSRP: $32.22
    Now: $24.90
    Rheem 68-101807-04 24" 10 Row Plastic Filter  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements ...
    MSRP: $32.22
    Now: $24.90
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    MSRP: $32.22
    Now: $24.90
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    Rheem 68-101807-03 19 3/4X21X3/8 Permanent Filter

    Rheem-Ruud

    MSRP: $31.86
    Now: $24.62
    Rheem 68-101807-03 19 3/4X21X3/8 Permanent Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $31.86
    Now: $24.62
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    MSRP: $31.86
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    Rheem 54-24094-03 Permanent Filter

    Rheem-Ruud

    MSRP: $36.71
    Now: $28.37
    Rheem 54-24094-03 Permanent Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements   Cross...
    MSRP: $36.71
    Now: $28.37
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    MSRP: $36.71
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    Rheem 54-24094-02 Permanent Filter

    Rheem-Ruud

    MSRP: $36.99
    Now: $28.59
    Rheem 54-24094-02 Permanent Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements   Cross...
    MSRP: $36.99
    Now: $28.59
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    MSRP: $36.99
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    Rheem 54-24094-01 Permanent Filter

    Rheem-Ruud

    MSRP: $28.81
    Now: $22.26
    Rheem 54-24094-01 Permanent Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements   Cross...
    MSRP: $28.81
    Now: $22.26
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    MSRP: $28.81
    Now: $22.26
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    Honeywell 14002913-002 .007 Red Filter Restrictor

    Honeywell

    MSRP: $22.41
    Now: $17.31
    Honeywell 14002913-002 .007 Red Filter Restrictor  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements...
    MSRP: $22.41
    Now: $17.31
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    MSRP: $22.41
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    Honeywell F76S1049 1 1/2 Thred, H20 Filter

    Resideo

    MSRP: $1,366.78
    Now: $1,056.15
    Honeywell F76S1049 1 1/2 Thred, H20 Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $1,366.78
    Now: $1,056.15
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    MSRP: $1,366.78
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    Honeywell F76S1023 Water Filter 1",100 Micron

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    MSRP: $801.19
    Now: $619.10
    Honeywell F76S1023 Water Filter 1",100 Micron   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements ...
    MSRP: $801.19
    Now: $619.10
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    MSRP: $801.19
    Now: $619.10
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    Honeywell F76S1015 3/4"Water Filter 100 Micron Swt & Npt

    Resideo

    MSRP: $652.64
    Now: $504.31
    Honeywell F76S1015 3/4"Water Filter 100 Micron Swt & Npt   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum...
    MSRP: $652.64
    Now: $504.31
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    MSRP: $652.64
    Now: $504.31
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    Honeywell F76S1007 1/2"Water Filter 100 Micron W/Gauge

    Resideo

    MSRP: $624.90
    Now: $482.88
    Honeywell F76S1007 1/2"Water Filter 100 Micron W/Gauge  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $624.90
    Now: $482.88
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    MSRP: $624.90
    Now: $482.88
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    Honeywell AS06-1A Replc Filter For FF06A

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    MSRP: $24.24
    Now: $18.73
    Honeywell AS06-1A Replc Filter For FF06A FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $24.24
    Now: $18.73
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    MSRP: $24.24
    Now: $18.73
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    Honeywell AF11S-112B 20 Micron Filter 1.5"-2"

    Resideo

    MSRP: $283.95
    Now: $219.41
    Honeywell AF11S-112B 20 Micron Filter 1.5"-2"  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $283.95
    Now: $219.41
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    MSRP: $283.95
    Now: $219.41
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    Johnson Controls A-4400-608 Replacement Filter

    Johnson Controls

    MSRP: $36.48
    Now: $28.19
    Johnson Controls A-4400-608 Replacement Filter  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $36.48
    Now: $28.19
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    MSRP: $36.48
    Now: $28.19
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    Johnson Controls A-4110-604 Coalescing Filter Element 10Scfm

    Johnson Controls

    MSRP: $174.55
    Now: $134.88
    Johnson Controls A-4110-604 Coalescing Filter Element 10Scfm  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $174.55
    Now: $134.88
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    MSRP: $174.55
    Now: $134.88
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    Johnson Controls A-4000-613 Intake Air Filter Cartridge; 30 Scfm

    Johnson Controls

    MSRP: $227.09
    Now: $175.48
    Johnson Controls A-4000-613 Intake Air Filter Cartridge; 30 Scfm  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum...
    MSRP: $227.09
    Now: $175.48
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    MSRP: $227.09
    Now: $175.48
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    Johnson Controls A-4000-6001 Filter Coalescing 40 Scfm

    Johnson Controls

    MSRP: $1,420.32
    Now: $1,097.52
    Johnson Controls A-4000-6001 Filter Coalescing 40 Scfm  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $1,420.32
    Now: $1,097.52
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    MSRP: $1,420.32
    Now: $1,097.52
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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.