PadMatch / Every humidifier water panel and furnace filter size
- MERV rating
- MERV 11
- Captures
- everything MERV 8 does plus finer dust, pet dander, smog and auto emission particles down to about 1 micron
- Filtrete MPR equivalent
- Filtrete MPR 1000 to 1200 (Micro Allergen tier); MPR 1500 and 1550 test closest to MERV 12
- Home Depot FPR equivalent
- Home Depot FPR 7
- Best for
- the common upgrade for homes with pets, mild allergies or a smoker
What MERV 11 filters out and how it maps to Filtrete MPR and Home Depot FPR.
MERV 11 on the ASHRAE 52.2 scale captures everything MERV 8 does plus finer dust, pet dander, smog and auto emission particles down to about 1 micron.
In the two proprietary retail scales, MERV 11 lines up with Filtrete MPR 1000 to 1200 (Micro Allergen tier); MPR 1500 and 1550 test closest to MERV 12 and Home Depot FPR 7. The conversions are approximate because each scale tests differently, so treat them as bands, not exact equals.
It is the common upgrade for homes with pets, mild allergies or a smoker. A higher MERV resists airflow more, so confirm the blower can pull through it before jumping several steps.
Find your model
Read the number stamped on the humidifier cabinet or printed on the old pad, then match it below. Confirm the frame size before buying a generic.
- MERV 8 furnace filterHome Depot FPR 5
- MERV 13 furnace filterHome Depot FPR 10
- 16 x 25 x 1 furnace filterthe common flat size in every MERV
Sources: Filterbuy MERV vs MPR vs FPR ratings guide · 3M Filtrete MERV vs MPR comparison (3M multimedia) · LearnMetrics FPR vs MERV chart