Replacement 18x24x2 air filters for homes, offices, and commercial HVAC systems. This collection covers every MERV rating we stock: fiberglass MERV 1–4, pleated MERV 8, MERV 10, MERV 11, and hospital-grade MERV 13. Free shipping on order...

20+ years in filtration 4.8 from 1,000+ reviews

25 products

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  • 18x24x2 AAF Flanders PREpleat LPD MERV 10 Standard Capacity 80055.021824 (12 Filters)
    MERV 10
    AAF Flanders

    18x24x2 PREpleat LPD MERV 10 Standard Capacity

    $226.99
    $226.99
    Case of 12 $18.92/filter
  • 18x24x2 AAF Flanders PREpleat LPD MERV 10 High Capacity 80255.021824 (12 Filters)
    MERV 10
    AAF Flanders

    18x24x2 PREpleat LPD MERV 10 High Capacity

    $226.99
    $226.99
    Case of 12 $18.92/filter
  • Custom filters
    Built to your exact size

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

    Build your filter
  • 12x24x2 PerfectPleat HC M8 Filter
    AAF Flanders

    18x24x2 PerfectPleat MERV 8 High Capacity

    $241.99
    $241.99
    Case of 12 $20.17/filter
  • 18x24x2 Koch Disposable Fiberglass Panel 276-180-240 (12 Filters)
    MERV 1-4
    Koch

    18x24x2 Disposable Fiberglass Panel Filter

    $198.99
    $198.99
    Case of 12 $16.58/filter
  • 18x24x2 AAF Flanders PREpleat M13 MERV 13 90013.021824 (12 Filters)
    MERV 13
    AAF Flanders

    18x24x2 PREpleat M13 MERV 13

    $313.99
    $313.99
    Case of 12 $26.17/filter
  • 18x24x2 AAF Flanders PREpleat Activated Carbon Odor Control 81255.021824 (12 Filters)
    AAF Flanders

    18x24x2 PREpleat Activated Carbon Odor Control

    $311.99
    $311.99
    Case of 12 $26.00/filter
  • 18x24x2 AAF Flanders PREpleat M11 MERV 11 High Capacity 85755.021824M11 (12 Filters)
    MERV 11
    AAF Flanders

    18x24x2 PREpleat M11 MERV 11 High Capacity

    $327.99
    $327.99
    Case of 12 $27.33/filter
  • Flanders AAF Pleated Filter Pre Pleat HV (12 Filters) 85455.021824
    Contact Support
    AAF Flanders

    18x24x2 PrePleat HV (High Velocity) MERV 8

    $291.99
    $291.99
    Case of 12 $24.33/filter
  • Koch Multi-Pleat Elite 18x24x2 MERV 8 high capacity self-supporting pleated panel filter
    MERV 8
    Koch

    18x24x2 Multi-Pleat Elite High Capacity MERV 8

    $132.36
    $132.36
    Case of 12 $11.03/filter
  • Koch Multi-Pleat Elite 18x24x2 MERV 8 standard capacity self-supporting pleated panel filter
    MERV 8
    Koch

    18x24x2 Multi-Pleat Elite Standard Capacity MERV 8

    $112.32
    $112.32
    Case of 12 $9.36/filter
  • Koch MicroMAX PL2S 18x24x2 MERV 11 2-inch synthetic-media plastic-frame box-style minipleat filter
    MERV 11
    Koch

    18x24x2 MicroMAX PL2S Box Style MERV 11

    $462.96
    $462.96
    Case of 6 $77.16/filter
  • Koch MicroMAX PL2S 18x24x2 MERV 13 2-inch synthetic-media plastic-frame box-style minipleat filter
    MERV 13
    Koch

    18x24x2 MicroMAX PL2S Box Style MERV 13

    $477.24
    $477.24
    Case of 6 $79.54/filter
  • Koch MicroMAX PL2S 18x24x2 MERV 14 2-inch synthetic-media plastic-frame box-style minipleat filter
    MERV 14
    Koch

    18x24x2 MicroMAX PL2S Box Style MERV 14

    $491.58
    $491.58
    Case of 6 $81.93/filter
  • 18x24x2 Koch Multi-Pleat Boss Heavy Duty MERV 13 High Capacity 102-714-118 (12 Filters)
    MERV 13
    Koch

    18x24x2 Multi-Pleat Boss Heavy Duty MERV 13 High Capacity

    $601.32
    $601.32
    Case of 12 $50.11/filter
  • 18x24x2 Koch Multi-Pleat Boss Heavy Duty MERV 11 High Capacity 102-500-118 (12 Filters)
    MERV 11
    Koch

    18x24x2 Multi-Pleat Boss Heavy Duty MERV 11 High Capacity

    $296.99
    $296.99
    Case of 12 $24.75/filter
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Commercial & facilities

Need 18x24x2 by the pallet?

Volume pricing on any size or MERV, plus recurring delivery schedules. We handle facilities and commercial orders daily and can usually match or beat distributor pricing.

Request a quote 1-866-469-8556 Talk to a filter expert

18x24x2 HVAC, Furnace & AC Filters

Replacement 18x24x2 air filters for homes, offices, and commercial HVAC systems. This collection covers every MERV rating we stock: fiberglass MERV 1–4, pleated MERV 8, MERV 10, MERV 11, and hospital-grade MERV 13. Free shipping on orders over $50.

If your rack is labeled 18x24x2, any filter here will fit. Actual dimensions vary slightly by manufacturer—check the product page for exact specs. Need a non-standard size? Our custom filters cut to 1/8″ precision.

Which MERV Rating Should I Choose?

  • MERV 1–4 (fiberglass) — Lowest cost. Protects your blower and coil from debris but won't improve air quality. Best for rentals and monthly-change schedules.
  • MERV 8 (pleated) — Residential and light-commercial standard. Captures dust, pollen, lint, and mold spores.
  • MERV 10–11 — Captures pet dander, finer particulate, and some bacteria. Recommended for pets, allergies, and facilities pursuing better IAQ.
  • MERV 13 — Hospital-grade. Captures smoke, bacteria, virus carriers, and most airborne allergens. ASHRAE and CDC recommend MERV 13 where the HVAC system can support it.

Not sure? Take our MERV quiz or call 1-866-469-8556.

How Often Should I Change a 18x24x2 Filter?

Plan on every 60–90 days for a 2″ filter in a typical residential or light-commercial system. Homes with pets, smokers, or allergies may need to replace every 30–60 days. Subscribe & save 10% on any filter in this collection.

Why Buy From RememberTheFilter.com

  • Trusted brands — AAF Flanders, Koch, and our own PrimeShield line, built by manufacturers we've partnered with for nearly two decades.
  • Filter Fit Guarantee — if it doesn't fit as expected, we'll make it right.
  • Free shipping over $50 to the lower 48, subscription discounts up to 10%, commercial & bulk pricing available.