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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.