Product D0110DOW, D0120DOW, D0110GOW, D0120GOW are "outside of wall or ground" integral sleeve dynamic curtain type fireplace dampers. Model D0110GOW and D0120GOW are designed for provide or return ducts that terminate at a grille or sign-up. Product D0110DOW and D0120DOW are created for through penetrations (ductwork connected to each side) in https://paxtonvmdrf.ourcodeblog.com/37161252/heavy-duty-stainless-steel-damper-manufacturers-an-overview