HVACQuick.com Accumulair 4 Inch Filters - MERV 13 FD12.75X21X4A

12.75x21x4 (Actual Size) Accumulair Diamond 4-Inch Filter (MERV 13) Accumulair 4" Diamond MERV 13 filters. - 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.