Model D0110DOW, D0120DOW, D0110GOW, D0120GOW are "out of wall or floor" integral sleeve dynamic curtain kind fire dampers. Product D0110GOW and D0120GOW are made for supply or return ducts that terminate in a grille or sign up. Model D0110DOW and D0120DOW are suitable for by means of penetrations (ductwork connected to https://dampersforindustrialsecto02255.blogdomago.com/35849706/the-5-second-trick-for-dampers-for-industrial-sector