Simplified method for designing a mechanical smoke exhaust system for high-rise buildings

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TypeArticle
Journal titleASHRAE Transactions
ISSN0001-2505
Volume91
Issue2A
Pages642656; # of pages: 15
Subjectsmoke controls; smoke vents; exhaust fans; dampers; high rise buildings; venting; exhaust fans; dampers; total pressure loss; exhaust rate; Smoke management
AbstractVenting is an effective way to prevent smoke from spreading from a fire area into escape routes and upper floors of high- rise buildings. A smoke exhaust system consists of a vertical shaft with dampered openings on each floor ( normally closed) and an exhaust fan at the top of the shaft. In the event of fire, the damper on the fire floor is opened and the exhaust fan operated to vent the fire floor. This induces air from the surrounding spaces to flow into the fire floor enclosure and the smoke to exit through the exhaust shaft to outdoors. Such a system requires the proper size of smoke shaft and exhaust fan capacity. A simplified design procedure and example calculations are presented. Measured and calculated values are in good agreement for total pressure loss and exhaust rate of a smoke exhaust system for a 34-story office building.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NotePresented at the 1985 ASHRAE Annual Meeting, Honolulu, HI, USA, June 23-26, 1985
Peer reviewedYes
IdentifierIRC-P-1401
NRC number26341
3935
NPARC number20375851
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Record identifiera37cb156-d5ed-4b85-a196-ad7e23c23849
Record created2012-07-23
Record modified2016-05-09
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