Design 0540V Wide Frame Static Curtain Fire Damper is UL accredited to be used the place constructing codes demand the safety of HVAC ductwork penetrations in vertical fire separations (partitions or partitions) that have a hearth resistant rating of four hrs or much less. The 0540 is assessed for use https://heavydutystainlesssteelda34677.elbloglibre.com/36948690/details-fiction-and-dampers-for-industrial-sector