Ceiling Radiation Dampers
Models are available in round or rectangular shapes with butterfly type blades or a curtain blade.
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What's New
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Application Information
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Project Profiles
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Other Product Information
Overview
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Model CRD-1WJ
The CRD-1WJ is a UL555C classified ceiling radiation damper for installation in wood joist ceiling construction and approved for use in 17 ceiling designs as detailed in the UL Fire Resistance Directory. The CRD-1WJ provides the ceiling radiation damper installed in an insulated steel enclosure with C, O or R inlet shapes to connect to ductwork. The damper is positioned in the enclosure to accommodate 1½ in. (38mm) grille depth.
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Model CRD
All models have been tested and are labeled in accordance with UL 555C, for protection of ceiling openings in floor/ceiling assemblies with fire resistance ratings of 3 hours or less. Models CRD-1 and CRD-2 are also Warnock Hersey listed for installation in 3-hour, non-combustible wood stud gypboard ceilings.
Instruction Manuals
Other Info
- Frequently Asked Questions about UL Dampers
UL Life Safety Damper Products Interactive Guide
Submittals
- CRD-1 (Rectangular, Butterfly Style)
- CRD-1 (Rectangular, Butterfly Style, Warnock Hersey)
- CRD-1LP (Rectangular, Low Profile Butterfly Style)
- CRD-1LP (Rectangular, Low Profile Butterfly Style, Warnock Hersey)
- CRD-2 (Round, Butterfly Style)
- CRD-2 (Round, Butterfly Style, Warnock Hersey)
- CRD-60 (Rectangular, Curtain Blade Style)
- CRD-60X (Rectangular, Curtain Blade, with Insulation Skirt)
- CRD-1WJ ceiling radiation damper for wood joist applications
