How to Measure Your Filter
Steps 1 & 2
Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).


Step 3
Measure the thickness (Depth) of your filter from front to back.

Step 4
Put Your measurements together (L x W x D).

Actual Size
A filter’s true dimensions.
Example: 19.75” x 19.75” x 1”
Nominal Size
Rounded numbers used by manufacturers.
Example 20” x 20” x 1”
View Detailed InstructionsAbout Filtre purificateur d'air de remplacement Aerostar pour filtre Winix A, 115115
Filtre purificateur d'air de remplacement Aerostar pour filtre Winix A, 115115
Compatible avec les modèles de filtre à air Winix : 6300, P300, 5300, 5500, 5300-2, 6300-2, AM90 et C535.
Remplace également le filtre Winix H, 116130 et remplace Sears Kenmore 85301.
Compatible avec les modèles de purificateur d'air Sears Kenmore 85300, taille : 12,63 x 16,30 x 0,98 + 4 préfiltres.
Filtre purificateur d'air de remplacement Aerostar pour filtre Winix A, 115115, 1PK
What is a MERV Rating?
MERV ratings let you know the efficiency and level of filtration that an air filter can handle under normal circumstances. The higher the MERV rating, the finer the particles are that are filtered our of the air in your home. Many air filter retailers use MERV or a similar rating to rate their air filters.

About MERV, MPR and FPR Rating

MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.

MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.

FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.