3M Filtrete MERV 11 direction
Usual starting point for easier airflow.
1-inchMERV 113M Filtrete direction
This is your filter setup
Standard 20x25x1 filter slot
3M Filtrete standard-filter direction. Verified product rows are shown below.
Size20x25 Depth/type1-inch Use3M Filtrete
Recommended starting point
3M Filtrete MERV 11 direction
MERV 11 is usually the safest starting point.
Higher MERV can improve filtration, but is not automatically better if your system cannot handle the added airflow resistance.
These filters fit
Compatible options
3M Filtrete MERV 13+ direction
Higher filtration direction. Confirm airflow fit.
1-inchMERV 13+3M Filtrete direction
Verified 3M listings
Current product options
Prices can change. Confirm size, depth, pack count, and availability before buying.
Higher-filtration 1-inch filters need good airflow/static pressure and regular changes.
| Store | Pack | Price | Each | MERV/MPR | Date | Link |
|---|---|---|---|---|---|---|
| Amazon | 2 | $28.17 | $14.09 | M11 / MPR 1000 | 5/16 | Open |
| Costco | 4 | $41.99 | $10.50 | M14 / MPR 2500 | 5/16 | Open |
When to replace
check/change about monthly.
Higher MERV note
Higher MERV can improve filtration, but is not automatically better if your system cannot handle the added airflow resistance.
Before buying
Confirm exact size, depth, MERV/MPR/FPR, pack count, price, and availability.