19.25 In. X 21.25 In. X 4 In. MERV 11 (FPR 7) Allergen Defense Pleated HVAC AC F

X 21.25 In. Installation is also made simple with the addition of easy-to-understand arrows that help identify the direction of air flow and subsequently the way the filter needs to be placed. To top it off, all our components are 100% manufactured within the United States and designed with recyclable materials, providing an eco-friendly alternative to enhancing your air quality.

NATIONAL GUARD L-700-BF-12×18 Door Louver,17 1/4 in H,11 1/4 in W 20J929

Door Louver, Material Steel, Opening Height 18 In., Opening Width 12 In. The NGP “no vision” door louver provides up to 70% air flow when installed in metal or wood doors. Made from 20-ga. cold-rolled steel frame, the louver features mitered and welded corners with welded reinforcing clips at the corners. 24-ga. steel blades have hemmed edges. The inverted “V” design includes countersunk mounting screw holes. Gray primer powder-coat finish.

NATIONAL GUARD L-700-BFDKB-12×18 Door Louver,17 1/4 in H,11 1/4 in W 20J934

Door Louver, Material Steel, Opening Height 18 In., Opening Width 12 In. The NGP “no vision” door louver provides up to 70% air flow When installed in metal or wood doors. Made from 20-ga. cold-rolled steel frame, the louver features mitered and welded corners with welded reinforcing clips at the corners. 24-ga. steel blades have hemmed edges. The inverted “V” design includes countersunk mounting screw holes. Dark bronze finish.

NATIONAL GUARD L-700-BFDKB-24×12 Door Louver,11 1/4 in H,23 1/4 in W 20J935

Door Louver, Material Steel, Opening Height 12 In., Opening Width 24 In. The NGP “no vision” door louver provides up to 70% air flow When installed in metal or wood doors. Made from 20-ga. cold-rolled steel frame, the louver features mitered and welded corners with welded reinforcing clips at the corners. 24-ga. steel blades have hemmed edges. The inverted “V” design includes countersunk mounting screw holes. Dark bronze finish.

NATIONAL GUARD L-700-BF-24×12 Door Louver,11 1/4 in H,23 1/4 in W 20J930

Door Louver, Material Steel, Opening Height 12 In., Opening Width 24 In. The NGP “no vision” door louver provides up to 70% air flow when installed in metal or wood doors. Made from 20-ga. cold-rolled steel frame, the louver features mitered and welded corners with welded reinforcing clips at the corners. 24-ga. steel blades have hemmed edges. The inverted “V” design includes countersunk mounting screw holes. Gray primer powder-coat finish.