Nailor Model 0722 Ceiling Dampers are for use in round programs, in lieu of hinged door kind dampers in any UL/ULC flooring/ceiling or roof/ceiling assembly with as much as a 3 hour hearth resistance rating the place air ducts are allowed. Athena Engeneering delves into these distinctions, supplying a comprehensive idea of when to https://heavydutystainlesssteelda57899.pointblog.net/considerations-to-know-about-heavy-duty-stainless-steel-damper-manufacturers-83681545