Model 0540V Wide Body Static Curtain Fire Damper is UL authorised for use where by making codes call for the protection of HVAC ductwork penetrations in vertical hearth separations (walls or partitions) that have a hearth resistant rating of four hours or fewer. The 0540 is classed to be used https://kameroneukxn.blogdanica.com/36901706/detailed-notes-on-heavy-duty-stainless-steel-damper-manufacturers