Design D0110DOW, D0120DOW, D0110GOW, D0120GOW are "out of wall or ground" integral sleeve dynamic curtain kind fireplace dampers. Model D0110GOW and D0120GOW are designed for source or return ducts that terminate at a grille or register. Product D0110DOW and D0120DOW are suitable for by penetrations (ductwork linked to either side) where https://heavydutystainlesssteelda99011.blogolenta.com/34110895/everything-about-dampers-for-industrial-sector