ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 36

Intertek directory listings. Intertek typically lists products
for use in specifi c applications, references specifi c
UL designs, and tests for compliance with applicable UL
standards, as required by the IBC.
Summary
An entire fl oor/ceiling or roof/ceiling assembly-ceiling
radiation damper, truss, gypsum board, etc.-must be
tested and listed to ANSI/UL 263 to be used in a specifi c
application. Just as a UL 555, Fire Dampers-classifi ed fi re
damper cannot be substituted for a UL 555C-classifi ed
ceiling radiation damper, a UL 555C-classifi ed ceiling
radiation damper cannot be substituted for an ANSI/UL
263-classifi ed wood-truss ceiling-damper assembly with
the assembly's UL fi re-resistive rating maintained, if the
damper was not tested and approved for the assembly.
Fire-rated fl oor/ceiling and roof/ceiling assemblies
requiring membrane protection can be tested any of
three ways:
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Director of ASHRAE Publications & Education
Mark S. Owen | E-mail: mowen@ashrae.org
Associate Publisher, ASHRAE Media Advertising
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Senior Coordinator-Advertising Production and Operations
Vanessa Thompson | E-mail: vthompson@ashrae.org
AAON www.aaon.com ....................................................................17
AHR Expo Chicago 2024 www.ahrexpo.com .............................30
Berner International www.berner.com .......................................31
ebm-papst www.ebmpapst.com .....................................................9
Greenheck Fan Corp. ecaps.greenheck.com ...............................5
Greenheck Fan Corp. www.greenheck.com .....................4th Cvr
Loren Cook Co. www.lorencook.com ................................2nd Cvr
Loren Cook Co. www.lorencook.com ..........................................11
Mars Air Systems www.marsair.com ..........................................10
MicroMetl Corp. www.micrometl.com ...........................................4
New York Blower Co. www.nyb.com ................................. 3rd Cvr
Pottorff www.pottorff.com .............................................................19
36
2023 AMCA inmot ion
■
Without ceiling radiation dampers, in which case they
are prohibited from being specifi ed or used in applications
requiring HVAC penetrations through ceiling
membranes.
■
With generic hinged-door-type dampers, in which
case any UL 555C-approved damper may be installed.
■
With a manufacturer-specifi c damper model, in which
case only the damper identifi ed in the listing agency's
directory may be installed. All designs of combustible
wood-truss or wood-joist fl oor/ceiling or roof/ceiling
assemblies permitting ceiling radiation dampers require
the use of manufacturer-specific damper models.
Dampers with only UL 555C approval may not be used
in combustible assemblies.
When a rated fl oor/ceiling or roof/ceiling assembly
containing a manufacturer-specifi c damper model (e.g.,
a fi re-rated wood-truss assembly used in multifamily
construction) is used, cooperation between the project
architect and the mechanical engineer in coordinating
construction specifi cations of rated barriers and HVAC
products is critical. If specifi c requirements of the HVAC
system must be met, then the architect must be sure to
specify the correct listed assembly. Consulting with the
local authority having jurisdiction is recommended to
ensure project requirements can be met and to discuss
any installation concerns.
References
1) AMCA. (2018). Ceiling dampers explained. Arlington Heights,
IL: Air Movement and Control Association International.
Retrieved from https://bit.ly/CDExplained
2) UL. (2011). Fire tests of building construction and materials.
ANSI/UL 263. Northbrook, IL: UL.
3) UL. (2014). Ceiling dampers. UL 555C. Northbrook, IL: UL.
4)
ICC. (2021). International building code (ch. 7). Washington,
DC: International Code Council.
5) ASTM. (2022). Standard test methods for fi re tests of building
construction and materials. ASTM E119. West Conshohocken,
PA: ASTM International.
About the Author
Michael J. Bulzomi is product manager, commercial
dampers, for Greenheck and chair of the AMCA Fire and
Smoke Damper Subcommittee.
www.amca.org

http://www.ashrae.org https://bit.ly/CDExplained http://www.aaon.com http://www.ahrexpo.com http://www.berner.com http://www.ebmpapst.com http://ecaps.greenheck.com http://www.greenheck.com http://www.lorencook.com http://www.lorencook.com http://www.marsair.com http://www.micrometl.com http://www.nyb.com http://www.pottorff.com http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2023

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