Ceiling Damper for Horizontal Installation in Air Duct Outlets of Restrained or Unrestrained Floor-Ceiling and Roof-Ceiling Assemblies with Fire Rating up to 3-Hours.
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Model Nos.
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Shape
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Max. Area
(sq.in)
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Max. Width
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Max. Len.
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Max. Dia.
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Min. Width
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Min. Len.
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Min. Dia.
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CFD-20
CFD-20ES
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Square or Rectangular
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576
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24"
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24"
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NA
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5"
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5"
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NA
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**Listing for dampers only, and damper may be used with UL-listed exhaust fans manufactured by Broan.
Note:
1. All dimensions have a tolerance of ± 1/16".
2. The fire rating of the floor/ceiling or roof/ceiling assembly (in which a given damper is installed) determines the overall fire rating. Thus, a 3-hour fire rated damper installed in a 1-hour fire rated (wood truss type, combustible floor/ceiling) assembly results in an overall fire rating of 1-hour for the whole unit.
3. The total number of damper shall not exceed the total number of 12" diameter or larger duct openings in any individual floor/ceiling or roof/ceiling design.
4. The installation must be per manufacturer's installation instructions or NFPA-90A.
5. Abbreviations: CFD = Ceiling Fire Damper; ES = Extended Sleeve; NS = No Sleeve; R = Round; LP = Low Profile; SB = Single Blade; ESC2 = Extended Sleeve with Side Collar; SC2 = Side Collar; ESR = Extended Sleeve with Round Collar Duct Connection; EST = Extended Sleeve Tapered; STC 2 = Extended Sleeve Tapered with Side Collar; NSB = No Sleeve with "B" type duct connection; ESET = Extended Sleeve with Extra Transion
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
ULC-S112(CAN-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
