Why it matters
The Simply MERV 11 4-inch Furnace Filter is a pleated furnace and air conditioner filter rated MERV 11.
MERV 11 is the usual allergy upgrade: it catches most pollen, pet dander and mold spores, and part of the 1 to 3 micron range.
Deep pleated filters hold several times the media of a 1-inch filter, so they run with less resistance and last longer.
As general guidance, check a 1-inch filter monthly and change it every one to three months; deeper 4- and 5-inch filters usually last six to twelve months.
This listing is the 20x25x4 size; order by the size printed on your old filter's frame.
The Simply listing names 6 filters per box.
Compared with the Simply Pleated MERV 8 Air Filter: MERV rating 11 here vs 8.
Who it's for, and who should skip it
Good fit if
- Allergy households
- Homes that change filters on schedule
Look elsewhere if
- Smoke or fine-particle control
Pros and cons
Pros
- MERV 11
Cons
- Measure your slot: nominal and actual sizes differ
Limitations to weigh
- Specifications are the maker's or seller's own figures; check fit against your equipment's model number and the actual size.
Specifications
The bracket shows where each figure comes from.
| Model number | S-11-06-20254 | Retailer |
|---|---|---|
| MERV rating | 11 | Retailer |
Alternatives worth comparing
More hvac and furnace filters we cover
- UBeesize MERV 8 1-inch Washable Furnace Filter
- Simply MERV 13 1-inch Furnace Filter
- Filtrete 14x14x1 MPR 1900 Air Filter
- Simply MERV 11 1-inch Furnace Filter
- Nordic Pure 12x24x1 Pleated MERV 13 Air Filter
All hvac and furnace filters, compared in one table · Every Simply product we cover
Final verdict
A practical choice for allergy households. Confirm the model it fits before ordering.
Where to buy
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