19-7/8x21-1/2x1 (Actual Size) Accumulair Diamond Filter MERV 13 4-Pack

- MERV 13 Rating - The all new Accumulair Diamond with it's MERV 13 rating is the highest efficiency Accumulair filter on the market! - Efficiency Designed to meet the air filtration efficiency criteria required to gain points toward certification in the Leadership in Energy and Environmental Design (LEEDs) Green Building rating system. - Electrostatically charged filter media captures airborne allergens smaller than 1 micron! - Great for helping reduce airborne allergens such as bacteria, particles that carry viruses, pollen, mold spores, fine dust, and pet dander. - Accumulair filter material will not support the development of mold, mildew, bacteria or other microorganisms in normal use. - No chemicals added. Accumulair filters are chemical free! - Over 30-times more efficient at capturing micro particles than ordinary fiberglass filters. - Lasts UP TO 3 months! - This product is listed and rated by Underwriters Laboratories as U.L. Class 2.