Styles 1221-DOW and 1221-OW are "away from wall" large general performance mixture fireplace/smoke damper specifically designed for applications in which the damper can not be put in in the aircraft of the wall or floor. They capabilities Nailor’s exceptional inter-locking double skin airfoil blade layout that gets rid of combustible seals and supplies https://gunnerbukym.jts-blog.com/35733054/5-essential-elements-for-dampers-for-industrial-sector