BDD Backdraft Dampers
BDD backdraft dampers are available in the spring-loaded and gravity style backdraft dampers. The spring loaded dampers are available in 4", 5", 6", & 8"models with a center pin design and a 10" & 12" center post design. The gravity damper is available in 7",14" & 16" and offers a galvanized steel housing and aluminum butterfly damper blades.