Filtrete 4-Inch MPR 1000 (MERV 11) Air Filter: MERV 11

Why it matters

The Filtrete 4-Inch MPR 1000 (MERV 11) Air 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.

A 4-inch filter (about 3 5/8 inches actual) fits 4-inch media cabinets and deep filter racks; it holds several times the pleated media of a 1-inch filter.

The listing sells it as 2 filters per pack; the material is polypropylene.

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 20x20x4 size; order by the size printed on your old filter's frame.

Compared with the Filtrete MPR 1500 (MERV 12) Air Filter: MERV rating 11 here vs 12.

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
2 Count per pack

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.

MERV rating	11	Retailer
Compatible devices	Air Conditioner, Furnace	Retailer
Dimensions (seller)	20"L x 20"W x 4"Th	Retailer
Product weight	4.07 pounds	Retailer
Unit count	2 Count	Retailer
Material	Polypropylene	Retailer
Model number	NADP02-2PK-1E	Retailer

Alternatives worth comparing

AirPurete MERV 11 5-inch Furnace FilterMERV 11 from AirPurete.

EconoHome Replacement Filter for Lennox X6670MERV 11 from EconoHome.

AIRx MERV 11 4-inch Furnace FilterMERV 11 from AIRx.

More hvac and furnace filters we cover

All hvac and furnace filters, compared in one table · Every Filtrete product we cover

Final verdict

A well-matched choice for allergy households. Confirm the model it fits before ordering.

Where to buy

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Questions buyers ask

Is MERV 11 right for my home?

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. If your system is old or the filter slot is a 1-inch return grille, watch for whistling or a filter that bows; those are signs to step down a grade.