Ceiling Radiation Dampers
UL 555C Classified
Ceiling Radiation Dampers
UL 555C Classified

Ceiling radiation dampers (also called ceiling dampers) protect openings in the ceiling membrane of rated floor/ceiling and roof/ceiling assemblies. These are UL 555C Classified.

CRD-1
CRD-1
Rectangular design.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1
CRD-1LP
CRD-1LP
Low profile for applications with limited blade clearance.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1lp
CRD-2
CRD-2
Round design.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-2
CRD-60
CRD-60
Curtain-type blade design for use with square openings.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-60
CRD-60x
CRD-60x
Curtain-type design manufactured with an attached insulation skirt.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-60x
CRD-501
CRD-501
Round design, Leakage rated.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-501
CRD-1WJ
CRD-1WJ
Rectangular Design, Wood Joist Applications, UL 555C.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1wj
CRD-1WT
CRD-1WT
Features side inlet/outlet for use in wood truss applications.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1wt
CRD-2WT
CRD-2WT
Features top inlet/outlet in wood truss application for a flush duct connection, above the ceiling for grille installation or extended below the ceiling for duct installation.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-2wt
CRD-1 (ETL)
CRD-1 (ETL)
ETL/Intertek listed (C#5005978) and UL tested to limit heat transfer through an opening in the ceiling membrane.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1-etl
CRD-1LP (ETL)
CRD-1LP (ETL)
ETL/Intertek listed (C#5005978) for use in low profile applications with limited blade clearance.
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-1lp-etl
CRD-2 (ETL)
CRD-2 (ETL)
Round design and ETL/Intertek listed (C#5005978).
https://catalog-api.greenheck.com/api/product/en-us/seo/crd-2-etl