Exact Filters® is our proprietary custom-size filter line—HVAC filters cut to your precise dimensions, down to 1/8″ on every side.

Cut to 1/8″ · Made in the USA

Exact Filters® is our own cut-to-order line — any size, to 1/8″, in the same media we sell to facilities and contractors. If your rack isn't a standard size, this is the range that fits it. Enter your size and we'll show what we make.

1/8″Cut-to-fit precision
20Years building custom filters
MERV 1–13Fiberglass through hospital-grade
$50+Free U.S. shipping
Made in the USA Filter Fit Guarantee Volume & recurring pricing

25001 products

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  • 20x21-5/8x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    20x21-5/8x1 Pleated MERV 8

    $211.99
    $211.99
    Case of 12 $17.67/filter
  • 18x19x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    18x19x1 Pleated MERV 8

    $201.99
    $201.99
    Case of 12 $16.83/filter
  • 26x20x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    26x20x1 Fiberglass MERV 1-4

    $184.99
    $184.99
    Case of 12 $15.42/filter
  • 13x21-1/2x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    13x21-1/2x1 Fiberglass MERV 1-4

    $174.99
    $174.99
    Case of 12 $14.58/filter
  • 16x28x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    16x28x1 Pleated MERV 8

    $204.99
    $204.99
    Case of 12 $17.08/filter
  • 19-1/2x19-1/2x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    19-1/2x19-1/2x1 Pleated MERV 8

    $201.99
    $201.99
    Case of 12 $16.83/filter
  • 20-1/8x23-1/8x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    20-1/8x23-1/8x1 Pleated MERV 8

    $211.99
    $211.99
    Case of 12 $17.67/filter
  • 23-1/2x29-1/4x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    23-1/2x29-1/4x1 Fiberglass MERV 1-4

    $196.99
    $196.99
    Case of 12 $16.42/filter
  • 21x22x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    21x22x1 Fiberglass MERV 1-4

    $183.99
    $183.99
    Case of 12 $15.33/filter
  • 23-1/2x29-1/2x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    23-1/2x29-1/2x1 Fiberglass MERV 1-4

    $196.99
    $196.99
    Case of 12 $16.42/filter
  • 23-1/8x19-3/8x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    23-1/8x19-3/8x1 Pleated MERV 8

    $218.99
    $218.99
    Case of 12 $18.25/filter
  • 14x23x1 Exact Filters Pleated MERV 8 (12 pack)
    MERV 8
    Exact Filters

    14x23x1 Pleated MERV 8

    $194.99
    $194.99
    Case of 12 $16.25/filter
  • 18x19x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    18x19x1 Fiberglass MERV 1-4

    $174.99
    $174.99
    Case of 12 $14.58/filter
  • 21x23x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    21x23x1 Fiberglass MERV 1-4

    $183.99
    $183.99
    Case of 12 $15.33/filter
  • 14x28x1 Exact Filters Fiberglass MERV 1-4 (12 pack)
    MERV 1-4
    Exact Filters

    14x28x1 Fiberglass MERV 1-4

    $167.99
    $167.99
    Case of 12 $14.00/filter
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Commercial & facilities

Need custom sizes in volume?

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

Exact Filters® — Custom Sizes, 1/8″ Precision

Exact Filters® is our proprietary custom-size filter line—HVAC filters cut to your precise dimensions, down to 1/8″ on every side. When your filter slot is 17-7/8″ × 23-3/4″ × 1″, you don't need to shim a standard 18×24×1 in place; you order an Exact Filter and it fits perfectly.

When to Order an Exact Filter

  • Your current filter is mis-sized and whistles, flutters, or lets air bypass the media
  • You have an older system with non-standard filter rack dimensions
  • You're outfitting a commercial rooftop unit or light-commercial AHU with a non-standard opening
  • You want the tightest possible fit to maximize filtration and eliminate bypass

Specifications

  • Any dimension in 1/8″ increments
  • MERV 8, 11, or 13 filtration
  • 1″ and 2″ depths standard, 4″ available on most sizes
  • Pleated synthetic media, built by our manufacturing partners
  • Typically ships within 3–5 business days

How to Measure

Measure the inside of your filter rack or slot—not a filter that's already in there, as that filter may itself be mis-sized. See our measurement guide for step-by-step instructions, or call 1-866-469-8556—we'll walk you through it.

Filter Fit Guarantee applies to Exact Filters just like our standard line. If it doesn't fit, we'll make it right.