CRD-1WJ

The CRD-1WJ is a UL 555C classified damper for installation in wood joist construction. These assemblies are given proprietary design numbers listed in the UL Fire Resistance Directory.

Ceiling Radiation Dampers

Damper Selection Guide

Which damper best fits the application? Greenheck’s damper interactive selection guide removes the guesswork. Find blade type, velocity, pressure, AMCA listings, submittals, drawings and more, all in one easy-to-use format.

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Certifications:

California State Fire Marshal (Listing # 3225-0981:0101)

UL 555C (Listing # R13446)

UL Fire Resistance Directory Approved Ceiling Design Number: L501, L502, L503, L506, L507, L508, L512, L513, L514, L515, L516, L517, L519, L522, L523, L533, L537, and L545

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