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Guide

Filtrete MPR vs MERV: what the numbers mean

MPR (Microparticle Performance Rating) is 3M Filtrete’s own rating scale. MERV (Minimum Efficiency Reporting Value) is the ASHRAE 52.2 / EPA scale used across brands. They are not the same number. Use 3M’s published comparison chart as a shopping map, then always trust the MERV printed on that SKU’s box — package labeling can vary by product line and year. Full MERV shopping guide: MERV 8 vs 11 vs 13.

Quick answer

• MPR ≠ MERV — a Filtrete “MPR 1000” is not “MERV 1000.” Compare MERV to MERV when you can.
• Common Filtrete labeling on this site — MPR 1000 packs are commonly labeled ≈ MERV 11 (Allergen Defense); MPR 1900 / 2200 packs are commonly labeled ≈ MERV 13. That matches 3M’s comparison chart pairs below.
• Trust the box — newer Filtrete cleaner-air pages and some catalog PDFs print different MERV numbers for similar MPR grades (for example MPR 1000 with MERV 10, or MPR 2200 / 2500 with MERV 14). The print on the package you buy wins.
• Home Depot FPR is a third scale. Do not mix FPR, MPR, and MERV as if they were interchangeable.

This page explains rating labels for shopping and fit. It does not claim health outcomes or allergy cures.

What MPR and MERV measure

MPR is Filtrete’s Microparticle Performance Rating. 3M describes it as indicating ability to capture tiny particles between about 0.3 and 1 micron in size — a brand scale for comparing Filtrete models to each other.

MERV is the industry Minimum Efficiency Reporting Value from ASHRAE Standard 52.2. The U.S. EPA publishes average capture-efficiency bands by particle size for ratings such as MERV 8, 11, and 13. Higher MERV generally means finer capture in those test bands — and can mean higher airflow resistance. Confirm your fan and filter slot can take the rating you buy. EPA overview: What is a MERV rating?

3M Filtrete MPR ↔ MERV comparison chart

Pairs below come from 3M’s public “MPR vs MERV” comparison PDF (Filtrete). Treat them as a shopping map, not a guarantee that every retail SKU with that MPR prints that MERV.

1085 and other odd MPR prints: if a pack is not on this chart, read the MERV (or “equivalent”) language on that box — we do not invent capture percentages here.

Why package MERV can disagree with the chart

3M’s comparison PDF is one published map. Filtrete’s U.S. cleaner-air / product pages and retailer catalog sheets sometimes print different MERV numbers next to similar MPR grades (examples called out above: MPR 1000 with MERV 10; MPR 2200 or 2500 with MERV 14). That is why this site’s money pages say “commonly labeled ≈ MERV …” and still point you at the size page for the SKU you will buy.

Home Depot’s FPR (Filter Performance Rating) is unrelated branding. If a shelf tag shows FPR only, look for MERV on the carton or manufacturer sheet before comparing to Honeywell, Nordic Pure, or AprilAire MERV rows.

Shop by size (no pack prices on this guide)

Prices move. This guide does not list Filtrete pack dollars. Open your printed size (prefer Target Filtrete rows on our size pages when both Target and Walmart appear), then pick an MPR/MERV your system can handle:

• 16x25x1 · MERV 13 comparison
• 20x20x1 · MERV 13 comparison
• 20x25x1 · MERV 13 comparison
• 16x20x1
• Pets / allergen shopping context: Pets / allergies
• All listed sizes: Size index · How often: change intervals

Where to buy

Use the size and MERV 13 pages for dated merchant tables. Prefer Target Filtrete links over Walmart when both are listed.

• MERV 13 money pages — 16x25x1 MERV 13 · 20x20x1 MERV 13 · 20x25x1 MERV 13
• Size hubs — 16x25x1 · 20x20x1 · 20x25x1 · 16x20x1
• Related guides — MERV 8 vs 11 vs 13 · Pets / allergies · How often

Full policy: disclosure.