Products 0110DOW, 0120DOW, 0110GOW and 0120GOW are "from wall or ground" integral sleeve static curtain style fireplace dampers.  Product 0110GOW and 0120GOW are particularly created for source or return ducts that terminate in a grille or sign-up. Product 0110DOW and 0120DOW are designed for via penetrations (ductwork connected to each https://angelouoesh.bloggosite.com/44231808/top-guidelines-of-heavy-duty-stainless-steel-damper-manufacturers