Product D0110DOW, D0120DOW, D0110GOW, D0120GOW are "from wall or ground" integral sleeve dynamic curtain style fire dampers. Model D0110GOW and D0120GOW are made for offer or return ducts that terminate in a grille or register. Design D0110DOW and D0120DOW are created for as a result of penetrations (ductwork connected to either https://simoncukym.gynoblog.com/35917897/facts-about-dampers-for-industrial-sector-revealed