SCHOFIELD, Wis. — Greenheck now offers an option for its ceiling exhaust fan and ceiling radiation damper to be combined at the factory into one unit shipped ready to install. Model CRD-310WT, a UL-classified ceiling radiation damper for wood truss applications, can be factory-mounted to one of six Greenheck ultra-quiet SP-A fan models (size 50-190 cfm), eliminating field assembly for fast, easy installation. The CRD-310WT damper is UL approved for use in 20 UL classified floor/ceiling and roof/ceiling assemblies making the CRD-310WT and SP-A combination a versatile code compliance option, ideal for bathrooms and storage areas in multifamily structures, condos, hotels, hospitals, and schools.

For more information, visit