This is a carton of three (3) MERV 11 replacement filters for the whole-house air cleaner. These are more efficient filters to replace part number 255649-105.

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American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE)


Environmental Protection Agency
Provides information and access to publications concerning indoor air quality issues, including radon, secondhand smoke, and carbon monoxide. From the U.S. Environmental Protection Agency.

U.S. Department of Labor Occupational Safety and Health Organization: OSHA