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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 KH29MD048 Filter Drier Core

    Carrier

    MSRP: $133.04
    Now: $102.80
    Filter Drier Core   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $133.04
    Now: $102.80
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    MSRP: $133.04
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    Carrier KH03DW161 Metal Mesh Filter

    Carrier

    MSRP: $45.74
    Now: $34.65
    Metal Mesh Filter  Item is Non Cancelable / Non Returnable FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum...
    MSRP: $45.74
    Now: $34.65
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    MSRP: $45.74
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    Carrier GAPCCCAR2025 Air Cleaner Filter 20" X 20" X 3.5" MERV 15

    Carrier

    MSRP: $246.41
    Now: $190.41
    Carrier GAPCCCAR2025 Air Cleaner Filter 20" X 20" X 3.5" MERV 15   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No...
    MSRP: $246.41
    Now: $190.41
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    MSRP: $246.41
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    Carrier GAPCCCAR1625 16x25 Media Filter

    Carrier

    MSRP: $241.02
    Now: $186.24
    16x25 Media Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $241.02
    Now: $186.24
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    MSRP: $241.02
    Now: $186.24
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    Carrier GAPCCCAR1620 16x20 Media Filter

    Carrier

    MSRP: $278.59
    Now: $215.27
    16x20 Media Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $278.59
    Now: $215.27
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    MSRP: $278.59
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    Carrier FILXXFNC0021 (Minimum purchase 2 ea) 4"x21" MERV Filter

    Carrier

    MSRP: $87.60
    Now: $66.36
    Carrier FILXXFNC0021 (Minimum purchase 2 ea) 4"x21" MERV Filter FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum...
    MSRP: $87.60
    Now: $66.36
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    MSRP: $87.60
    Now: $66.36
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    Carrier FILXXCAR0016 16x25 Cartridge Filter - 2pack

    Carrier

    MSRP: $74.02
    Now: $56.08
    16x25 Cartridge Filter - 2pack   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $74.02
    Now: $56.08
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    MSRP: $74.02
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    Carrier EXPXXFIL0024 Expandable Media Air Filter

    Carrier

    MSRP: $128.73
    Now: $99.48
    Expandable Media Air Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $128.73
    Now: $99.48
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    MSRP: $128.73
    Now: $99.48
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    Carrier EXPXXFIL0020 EZ Flex Expandable Filter 20X25

    Carrier

    MSRP: $119.82
    Now: $92.59
    EZ Flex Expandable Filter 20X25   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $119.82
    Now: $92.59
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    MSRP: $119.82
    Now: $92.59
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    Carrier EXPXXFIL0016 Filter

    Carrier

    MSRP: $117.45
    Now: $90.75
    Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $117.45
    Now: $90.75
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    MSRP: $117.45
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    Carrier 5H120-351 Oil Filter

    Carrier

    MSRP: $79.60
    Now: $61.51
    Oil Filter This item is non-cancelable and non-returnable. FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $79.60
    Now: $61.51
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    MSRP: $79.60
    Now: $61.51
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    Carrier 50HJ540574 Intake Metal Mesh Filter

    Carrier

    MSRP: $66.61
    Now: $51.47
    Intake Metal Mesh Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $66.61
    Now: $51.47
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    MSRP: $66.61
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    Carrier 40QA500068 Air Filter, 11.6"x8.35"

    Carrier

    MSRP: $140.65
    Now: $106.55
    Air Filter, 11.6"x8.35"   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $140.65
    Now: $106.55
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    MSRP: $140.65
    Now: $106.55
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    Carrier 40QA500067 Filter

    Carrier

    MSRP: $136.97
    Now: $103.76
    Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $136.97
    Now: $103.76
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    MSRP: $136.97
    Now: $103.76
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    Carrier 37AF400014 Filter

    Carrier

    MSRP: $47.21
    Now: $35.76
    Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $47.21
    Now: $35.76
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    MSRP: $47.21
    Now: $35.76
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    Carrier 36B0003N02 Drier, Filter

    Carrier

    MSRP: $583.74
    Now: $451.07
    Drier, Filter   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $583.74
    Now: $451.07
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    MSRP: $583.74
    Now: $451.07
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    Carrier 356066-0602 Pre-Filter (2 per package)

    Carrier

    MSRP: $87.38
    Now: $66.20
    Pre-Filter (2 per package)   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $87.38
    Now: $66.20
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    MSRP: $87.38
    Now: $66.20
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    Carrier 356066-0601 20x12 PreFilter 1pc

    Carrier

    MSRP: $107.58
    Now: $81.50
    20x12 PreFilter 1pc Item is Non Cancelable / Non Returnable FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum...
    MSRP: $107.58
    Now: $81.50
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    MSRP: $107.58
    Now: $81.50
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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.