Design D0110DOW, D0120DOW, D0110GOW, D0120GOW are "out of wall or floor" integral sleeve dynamic curtain kind hearth dampers. Product D0110GOW and D0120GOW are suitable for supply or return ducts that terminate in a grille or sign-up. Design D0110DOW and D0120DOW are made for through penetrations (ductwork linked to both sides) in https://dampers-for-industrial-se80112.blogars.com/35775202/5-simple-statements-about-dampers-for-industrial-sector-explained