Ceiling Dampers - Wood Truss
Series: CDH
The CDH series offers a complete line of Wood Truss Rated Ceiling Radiation Dampers. These dampers are specifically designed and tested for wood truss and wood joist constructed buildings. They are listed with Intertek, a Nationally Recognized Test Lab (NRTL), and bear the Warnock-Hersey label. The CDH series of wood truss ceiling dampers are UL 263 approved as an acceptable component in a vast number of UL 263 rated wood truss and wood joist floor/ceiling and roof/ceiling designs (See submittals for specific approved UL design numbers).  

The CDH series of wood truss ceiling radiation dampers are available installed in multiple insulated and non-insulated boot/box configurations. All boots/boxes are approved rated assemblies to bear the Warnock-Hersey label for testing in compliance with UL 263.

Ceiling Dampers - Butterfly Blade
Series: CD
The CD series offers a complete range of UL, ULC & California State Fire Marshal listed butterfly blade ceiling radiation dampers. The CD series is suitable for application in surface mount (steel duct drop) and lay-in applications. When provided with the optional adjustable volume control, NCA's CD series can double as a volume control damper.
Ceiling Dampers - Thermal Fabric Blade Curtain Type
Series: CFS
The CFS series offers a complete range of UL, ULC & California State Fire Marshal listed thermal fabric blade curtain-type ceiling radiation dampers. The CFS series is applicable to both ducted (CFS & CFSB) or non-ducted (CFSX) air systems, especially when a compact design is required.
Thermal Blankets
Series: CK
These lightweight, non-asbestos fabric blankets offer insulation protection to exposed metal components. Thermal blankets are required for the protection of the backpan of lay-in type diffusers.
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