ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 26

Photograph courtesy of Greenheck Fan Corp.
Photograph courtesy of Systemair USA
Photograph courtesy of S&P USA Ventilation Systems LLC
Jet fans installed in parking garages.
Designing for Smoke Control
Tradit ionally, smoke control is designed for the
critical velocity of 10 fps (3 m/s). Thus, when designing
a parking-garage ventilation system, we are looking to
induce a fl ow of at least 10 fps (3 m/s) from the supplyair
source to the extractor fans.
The supply-air source and the extractor fans are
placed so that air, when fl owing from one location to the
other, always is moving away from means of egress.
Thus, evacuees always are walking against the fl ow of
air and away from the smoke created by a fi re (Figure 1).
Extract Fans
10 air changes
100% is extracting
smoke at high level
-i.e. 10 ac/h
Jet Thrust Fan
Supply Air
Photograph courtesy of Woods Air Movement Ltd.
Understanding Fire Regulations
Around the world, standards for the design of parkinggarage
ventilation systems can vary signifi cantly. In the
United States, the 2021 International Mechanical Code
(IMC) establishes minimum requirements using prescriptive
and performance-related provisions. The IMC was
developed with broad-based principles that make possible
the use of new materials, methods, and designs.
The 2015 ASHRAE Handbook-HVAC Applications
(Section 15.19) constitutes a fundamentally different
approach to parking-garage-ventilation-system design.
The IMC design approach is to apply a fi xed multiplier
to either parking-garage fl oor area or volume such that, if
the fl oor area or volume doubles, the required ventilation
doubles. The ASHRAE Handbook design approach is based
on a calculation taking into account estimated traffi c and
average automobile emissions. Both design approaches
must fulfi ll requirements for removing pollutants and,
in the event of a fi re, smoke and hot air.
FIGURE 1. Strategically placed in a parking garage,
jet fans ensure air moves from the supply point to
extraction points at or above the critical velocity of
smoke, 10 fps (3 m/s). This helps to ensure occupants
have a smoke-free means of escape. Image courtesy of
Woods Air Movement Ltd.
26
2021 AMCA inmot ion
Introducing Jet Fans
In North America, the jet fan, a technology long accepted
globally as a cost-effective alternative to traditional ducted
parking-garage ventilation, is gaining traction.
www.amca.org
http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2021

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2021

Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 16
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 17
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 26
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 27
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 28
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 29
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 31
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 32
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 33
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 34
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 35
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 36
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 37
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 38
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 39
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 40
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 41
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 42
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 43
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 44
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IOYTBC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SGAJJF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IGHYER
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PDRKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XCODFR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QSLFGO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ILKVNM
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2021
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPDJKD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VJKSRY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDHUTC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JPPKRR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDLTTH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CKLLES
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SLDOX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_HJETUK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OLUHGE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ZERDGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QVMNEO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTPOKE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_BBATRE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_STUBMW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TPEMPE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JNMKDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FBTTPA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WQMMNE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TVBRYN
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2020
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_KTUZMA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ABEDGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201910
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201909
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019septmeber_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019september
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201908
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201907
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201906
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201905
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201904
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019april
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201903
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019march
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201902
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201901
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2019
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018december
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018october
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2018
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201810
https://www.nxtbook.com/nxtbooks/ashrae/ashraeinsights_201806
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201805
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201804
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201803
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201712
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201711
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201710
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201709
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201705
https://www.nxtbook.com/nxtbooks/ashrae/ashrae_meetinginsert_201610
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acrexindia
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer
https://www.nxtbook.com/nxtbooks/amca/2014summer2
https://www.nxtbook.com/nxtbooks/amca/2014summer
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acma_2014summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201311
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201309
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acmasupp_2013fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201305
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201303
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2013winter
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201211
https://www.nxtbook.com/nxtbooks/ashrae/achr_expo_mexico2012
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201209
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v3
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201205
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201203
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012winter
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201111_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201109_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2011summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201105
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201103
https://www.nxtbookmedia.com