BNX manufactures the highest grade 20x20x1 MERV 11 air filters and does so in the United States. Available in MERV 11, MERV 13, and MERV 8
20x23x1-BNX
20x23x1-BNX
BNX manufactures the highest grade 20x20x1 MERV 11 air filters and does so in the United States. Available in MERV 11, MERV 13, and MERV 8