These newly developed back-draft dampers are manufactured with quality components and precision engineering. The damper is used to prevent air from reverse flowing through the fan (when powered off) which allows no contaminated air to escape from the area untreated.
4″ UPC840470004005
6″ UPC840470004029
8″ UPC840470004036
10 UPC840470004043
12″ UPC840470004050
14″ UPC840470004061
