Model RD2-R

3 Hour - Ceiling Radiation Damper
Round Blade

The RD2-R ceiling radiation damper employs butterfly style blades for point-of-origin control of radiant heat in HVAC systems. The RD2-R is installed horizontally in the ceiling membrane of floor-ceiling or roof-ceiling assemblies with fire resistance ratings up to and including 3 hours.

Standard Construction

Frame: 24 ga. (0.7) galvanized steel.
Blades: 22 ga. (0.85) galvanized steel - round butterfly. Insulated with ceramic refractory material for dampers larger than 114 in² (735 cm²).
Fire Closure Device: Fusible Link.
Fire Closure Temperature: 165^oF (75^oC).
Minimum Size: 4" Ø (102 Ø)
Maximum Size: 24" Ø (610 Ø)

Ratings

UL 555C Fire Resistance Rating: 3 hour (horizontal, for use in 1, 2 or 3 hour rated assemblies).

UL 555C Listing: R14980
CSFM Listing: 3226-1404:100
Warnock Hersey Listing #: WHI-495-PSH-0177, -0178
Meets NFPA Standards: 90A and 101
Meets Building Code Standards: IBC, NBC, NFPA, SBC and UBC