Ceiling Damper for horizontal mounting in air duct outlets in 3 hour non-combustible and 1 hour combustible ceiling locations.
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Construction and Size Limitations shall be as follows:
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SIZE LIMITATIONS, INCHES
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Damper Type
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Damper Shape
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Protection On Back Of Damper Blades
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Max Area
+, In2
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Max Width
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Max Length
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Min Width
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Min Length
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| CFD-4* |
Square or Rectangular |
Wallboard & Ceramic Paper |
576 |
24 |
24 |
4 |
10 |
| CFD-4A* |
Square or Rectangular |
Wallboard & Ceramic Paper |
576 |
24 |
24 |
4 |
10 |
| CFD-4W |
Square or Rectangular |
Wallboard & Ceramic Paper |
578 |
24 |
24 |
4 |
10 |
| CFD-4AW |
Square or Rectangular |
Wallboard & Ceramic Paper |
578 |
24 |
24 |
4 |
10 |
Ceiling Damper for horizontal mounting in air duct outlets in 3
Evaluated to the following:
Unless otherwise noted, assemblies in this section have been evaluated for conformance to the following standards:
UL-555, Fire Dampers & Ceiling Dampers
CAN/ULC-S112, Standard Method of Fire Test of Fire Damper Assemblies;
and are installed in accordance with the following:
NFPA-90A, Installation of Air Conditioning & Ventilating Systems.
Manufacturer's Instructions.
All assemblies are identified by all label bearing the wording, "Listed (Product)", a time interval, a serial number and the Warnock Hersey Certification Mark.
