The damper employs a folded curtain style blade for point-of-origin control of radiant heat in a ventilation system. GBR-CRD installs horizontally in the ceiling membrane for floor/ceiling or roof/ceiling assemblies with a fire resistance rating up to and including 3 hours.
UL and cUL listed and exceeds UL 555C for use in 3-hour fire rated assemblies
Warnock-Hersey certified for use in fi re rated floor/ceiling or roof/ceiling assemblies
CSFM listing: 3226-0368:104
Meets NFPA Standards: 90A and 101
Meets Building Code Standards: IBC, NBC, NFPA, SBC, and UBC
Available for Delta Breez Ventilation Fans: GBR50, GBR50L, GBR80, GBR80L, GBR80H, GBR80HL, GBR80MHL, GBR80LED, GBR100, GBR100H and GBR100L