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Filter Rating and Pressure Drop Comparison

Compare actual filter MERV ratings and measured or published pressure drops at one airflow against an assessed filter allowance.

Use this result well

Inputs that matter
Common comparison airflow (CFM), Assessed filter pressure allowance (in. w.c.), Product A MERV, Product A pressure drop at this airflow (in. w.c.), and 3 more
Output to expect
Filter ratings and pressure comparison
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Filter ratings and pressure comparison

Compare two actual filter products using their MERV and pressure drop at the same entered airflow. Enter the filter pressure allowance from a system assessment. MERV describes particle-capture testing; it does not determine pressure drop, compatibility or an individual health outcome.

Pressure headroom = assessed filter pressure allowance − published product pressure drop at matching airflow.

Updated: September 2026

Example Scenarios

The built-in example uses fictional planning records. Replace these with your own verified details.

→ 0.06 in. w.c. B minus A

FAQ

No. Enter product-specific pressure data at the same airflow. MERV describes particle performance under its test method; system fit and total external static pressure require separate review.

Use your own records on the units and period shown. Verify current requirements, enter explicit zeros for absent amounts where requested and retain dated sources.

Choose Save planning case for local history. Copy MD includes current inputs, notes and interpretation; Download CSV exports the result breakdown. Keep a portable copy separately.

About Filter Rating and Pressure Drop Comparison

Compare two actual filter products using their MERV and pressure drop at the same entered airflow. Enter the filter pressure allowance from a system assessment. MERV describes particle-capture testing; it does not determine pressure drop, compatibility or an individual health outcome.