Entry-level fiberglass and low-MERV pleated filters for residential furnaces, air conditioners, and heat pumps. These are the filters to buy when price is the primary driver—rental properties, basements, utility rooms, and anywhere high-...

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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
  • PrimeShield MAX Airflow MERV 1-4 Fiberglass Panel Basic Air Filters (12 Pack)
    MERV 1-4
    RTF

    PrimeShield MAX Airflow MERV 1-4 Fiberglass Panel Basic Air Filters

    From $57.99
    From $57.99
    Case of 12 $4.83/filter
  • Koch Disposable Fiberglass Panel Filter
    MERV 1-4
    Koch

    Disposable Fiberglass Panel Filter

    From $59.99
    From $59.99
  • Koch Disposable Polyester Panel Filter
    MERV 1-4
    Koch

    Disposable Polyester Panel Filter

    From $69.99
    From $69.99
  • Custom Size Flanders EZ Flow Fiberglass MERV 1-4 Air Filter
    MERV 1-4
    AAF Flanders

    Custom Size Flanders EZ Flow Fiberglass MERV 1-4 Air Filter

    $199.99
    $199.99
  • Custom Size Koch Disposable Panel Air Filter
    MERV 1-4
    Koch

    Custom Size Disposable Panel Air Filter

    From $218.99
    From $218.99

Basic Furnace Filters — Economical Protection for Residential & Light-Commercial HVAC

Entry-level fiberglass and low-MERV pleated filters for residential furnaces, air conditioners, and heat pumps. These are the filters to buy when price is the primary driver—rental properties, basements, utility rooms, and anywhere high-end filtration isn't the priority.

What "Basic" Means

Basic filters capture large particulate (dust, lint, hair, carpet fibers) to protect your HVAC equipment from debris. They're not designed to improve indoor air quality. If allergies, pets, smoke, or asthma are concerns, step up to at least MERV 8 pleated.

Why These Still Make Sense

  • Rental properties — affordable case pricing
  • Monthly changers — cheap-and-frequent is often more cost-effective than expensive-and-lasting
  • Backup stock — keep a year's supply on hand at the lowest per-filter price
  • Pre-filters in systems with a high-MERV final filter

Built by AAF Flanders and other trusted manufacturers. Free shipping over $50.