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.

Aire Technologies' Ceiling Radiation Dampers (CRDs) are engineered and tested to prevent heat from radiating into the truss or joist space in a floor-ceiling or roof-ceiling assembly. Our ceiling radiation dampers are offered in rectangular and round configurations as well as multiple True Truss™ enclosure types.

2024年5月10日 · This article explains how to determine the correct ceiling radiation damper based on the fire-resistance-rated floor/ceiling or roof/ceiling assembly used in construction.

Nailor ceiling dampers, or ceiling radiation dampers as they are commonly called, are designed to function as a fire and heat barrier in air duct openings penetrating fire resistive membrane ceilings.

CFD7(T) is the only UL approved radiation damper that can be used as supply/return air plenum to connect to AHU unit below the ceiling assembly. CFD7 is the first Ceiling Radiation Damper to be UL listed for 2” x10” or 2” x 12” wood joist assemblies (Ref. L501). The CFD7 is listed on 21 different UL rated ceiling designs.

•Identify the different types of Ceiling Radiation Dampers •Understand the difference between a Ceiling Radiation Damper and other life safety dampers •Find and identify critical information regarding Ceiling Radiation Dampers in construction documents. •Understand the UL Product IQ listing requirements for

1. Identify the difference between a UL555C rated Ceiling Radiation Damper and a UL263 rated assembly that includes a Ceiling Radiation Damper. 2. Explain how to identify and read a UL Floor-Ceiling or Roof-Ceiling design. 3. Describe the difference between a Fire Damper and a Ceiling Radiation Damper. 4.

The SP Ceiling Radiation damper protects fire rated ceilings and effectively blocks the spread of heat and flames through the building's ventilation system. This damper is UL Classified; rated at three to four hours fire resistance. For use with Lighted SP Fans. Shop Greenheck Ceiling Radiation Dampers.

The CRD-1 is a UL555C classified damper designed to limit the radiant heat transfer through an opening in the ceiling membrane of a fire resistance