Nailor Product 0722 Ceiling Dampers are for use in round programs, in lieu of hinged doorway form dampers in any UL/ULC floor/ceiling or roof/ceiling assembly with around a 3 hour hearth resistance score the place air ducts are permitted. Find out more Supporting Every person Assess info See how Research provides significant-excellent details by https://heavydutystainlesssteelda67899.mybuzzblog.com/16729683/5-tips-about-heavy-duty-stainless-steel-damper-manufacturers-you-can-use-today