Design D0110DOW, D0120DOW, D0110GOW, D0120GOW are "out of wall or flooring" integral sleeve dynamic curtain kind fireplace dampers. Model D0110GOW and D0120GOW are suitable for provide or return ducts that terminate in a grille or register. Product D0110DOW and D0120DOW are made for through penetrations (ductwork connected to either side) the https://waylonaqftg.blogproducer.com/44416007/heavy-duty-stainless-steel-damper-manufacturers-can-be-fun-for-anyone