Design D0110DOW, D0120DOW, D0110GOW, D0120GOW are "from wall or flooring" integral sleeve dynamic curtain type hearth dampers. Model D0110GOW and D0120GOW are suitable for source or return ducts that terminate in a grille or sign up. Model D0110DOW and D0120DOW are designed for through penetrations (ductwork connected to either side) in https://archerbujyl.blognody.com/41100268/the-single-best-strategy-to-use-for-dampers-for-industrial-sector