Basic fiberglass filters protect your HVAC equipment and maintain maximum airflow. They capture lint, hair, large dust particles, and carpet fibers — keeping coils clean and motors running cool — without restricting CFM or driving up sta...

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  • Flanders EZ Flow Fiberglass MERV 1-4 Filter (12 Filters)
    MERV 1-4
    AAF Flanders

    Flanders EZ Flow Fiberglass MERV 1-4 Filter

    From $59.99
    From $59.99
    Case of 12 $5.00/filter
  • Flanders Nested Glass EZ-Green Filter
    MERV 1-4
    AAF Flanders

    Flanders Nested Glass EZ-Green Filter

    From $114.99
    From $114.99
  • Custom filters
    Built to your exact size

    Any size, cut to 1/8″. Depth 1″–6″ · MERV 1–13.

    Build your filter
  • 20x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.012020 (12 Filters)
    MERV 1-4
    AAF Flanders

    20x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $61.99
    $61.99
    Case of 12 $5.17/filter
  • 14x14x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011414 (12 Filters)
    MERV 1-4
    AAF Flanders

    14x14x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $59.99
    $59.99
    Case of 12 $5.00/filter
  • 12x12x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011212 (12 Filters)
    MERV 1-4
    AAF Flanders

    12x12x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $59.99
    $59.99
    Case of 12 $5.00/filter
  • 16x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011620 (12 Filters)
    MERV 1-4
    AAF Flanders

    16x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $59.99
    $59.99
    Case of 12 $5.00/filter
  • 16x25x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011625 (12 Filters)
    MERV 1-4
    AAF Flanders

    16x25x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $62.99
    $62.99
    Case of 12 $5.25/filter
  • 20x25x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.012025 (12 Filters)
    MERV 1-4
    AAF Flanders

    20x25x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $72.99
    $72.99
    Case of 12 $6.08/filter
  • 20x22x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.012022 (12 Filters)
    MERV 1-4
    AAF Flanders

    20x22x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $75.99
    $75.99
    Case of 12 $6.33/filter
  • 20x30x1 NaturalAire Cut-to-Fit Natural Fiber Washable Filter SM1006 (6 pack)
    MERV 1-4
    AAF Flanders

    20x30x1 NaturalAire Cut-to-Fit Natural Fiber Washable Filter SM1006

    $78.99
    $78.99
    Case of 6 $13.17/filter
  • 14x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011424 (12 Filters)
    MERV 1-4
    AAF Flanders

    14x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $59.99
    $59.99
    Case of 12 $5.00/filter
  • 18x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011824 (12 Filters)
    MERV 1-4
    AAF Flanders

    18x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $64.99
    $64.99
    Case of 12 $5.42/filter
  • 14x30x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011430 (12 Filters)
    MERV 1-4
    AAF Flanders

    14x30x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $97.99
    $97.99
    Case of 12 $8.17/filter
  • 18x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011820 (12 Filters)
    MERV 1-4
    AAF Flanders

    18x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $61.99
    $61.99
    Case of 12 $5.17/filter
  • 12x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011224 (12 Filters)
    MERV 1-4
    AAF Flanders

    12x24x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $59.99
    $59.99
    Case of 12 $5.00/filter
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Basic Fiberglass & Low-MERV Air Filters

Basic fiberglass filters protect your HVAC equipment and maintain maximum airflow. They capture lint, hair, large dust particles, and carpet fibers — keeping coils clean and motors running cool — without restricting CFM or driving up static pressure. They're the right call when your priority is equipment protection and energy efficiency rather than indoor air quality.

What "MERV 1–4" Actually Means

MERV 1–4 is the standard rating range for spun fiberglass and basic polyester media. These filters trap particles 10 microns and larger — the visible dust and debris that clogs evaporator coils, fouls blower wheels, and shortens equipment life. They're not designed to remove the smaller particles (pollen, mold spores, bacteria) that affect breathing — that's what MERV 8 and higher pleated filters do. Don't confuse "low MERV" with "poor filtration." For equipment protection, fiberglass is purpose-built for the job.

What's in This Collection

  • EZ Flow II Fiberglass Filters — AAF Flanders' workhorse residential and light-commercial fiberglass panel. UL Class 2.
  • Nested Glass EZ-Green Filters — self-retaining green spun fiberglass, 50+ years in production. Available in 24-pack cases.
  • Polyester media filters — washable and disposable polyester for grilles and return air systems.

Who Uses Basic Filters

  • Property managers & landlords with multi-unit portfolios — case quantities for turnovers
  • HVAC contractors stocking service vans
  • Facilities teams running maintenance schedules where equipment protection matters more than IAQ
  • Homeowners on tight budgets who change filters frequently

If your tenants, residents, or building occupants have allergies, asthma, pets, or any indoor air quality concerns, step up to a MERV 8 pleated filter or higher. Volume pricing for case-quantity buyers — call 1-866-469-8556 or request a quote.