ASHRAE Journal - November 2022 - 31
COLUMN BUILDING SCIENCES
correct, as the second part fi xes the
fi rst part.
So, if was in charge, this is the
change I would make to the code:
Return air openings.
Return air shall not be taken from a
closet, bathroom, toilet room, kitchen,
garage, boiler room, furnace room or
unconditioned attic.
Exceptions:
Taking return air from a closet is not
prohibited where such return air taken
from closets shall serve only the closet and
may be taken from closets that have no
dedicated supply duct. Where return air is
taken from a closet smaller than 30 ft2 (2.8
m2), the return air shall be no more than
30 cfm (15 L/s), shall serve only the closet
and shall not require a dedicated supply
duct. Where return air is taken from a
closet smaller than 30 ft2 (2.8 m2), the
closet door shall be undercut a minimum
of 1.5 inches (38 mm) or the closet shall
include a louvered door or transfer grille
with a minimum net free area of 30 inch2
(194 cm2).
Reason:
Mold growth is now common in closets
due to higher interior moisture loads
and less heat gain in closets. Allowing a
limited amount of return air provides a
means of controlling closet moisture levels.
Providing supply air to a closet exacerbates
the problem by making closet surfaces
colder.
OK, parting shot at codes: codes
are no longer just technical documents.
They have also become
SOLUTIONS FOR ENERGY SAVINGS
SData Center
olutions Portfolio
Armacell can help your Data Center keeps its cool.
The right mechanical insulation is critical to promote
optimal energy efficiency that will drive lower PUE in data
centers. Armacell's targeted insulation Solutions Portfolio
offers comprehensive product packages for code
compliance, system performance, and budget designed
especially for data centers. Now backed by a 5-, 10-, or
15-year warranty!
www.armacell.us/solutions
political documents. The code
process is now also political and
not just technical. At times it seems
dominated by lobbyists, consultants,
special interest groups and
manufacturers who use the code
process to promote specifi c agendas,
limit competition to require their
products to be used or both-while
trying to save the world. Still trying
to understand the politics of return
air from closets. Pretty sure that the
Chamber of Commerce or AARP
are not involved. And, yes, I am a
" consultant. " I put the " con " into
" consulting. "
Reference
1. Bower, J. 1989. The Healthy House: How to
Buy One, How to Build One, How to Cure a " Sick "
One. Healthy House Institute.
N O V E M B E R 2 0 2 2 ashrae.o rg ASHRAE JOURNAL
31
© Armacell, 2022
http://www.armacell.us/solutions
https://www.ashrae.org/
ASHRAE Journal - November 2022
Table of Contents for the Digital Edition of ASHRAE Journal - November 2022
Contents
ASHRAE Journal - November 2022 - Intro
ASHRAE Journal - November 2022 - Cover1
ASHRAE Journal - November 2022 - Cover2
ASHRAE Journal - November 2022 - 1
ASHRAE Journal - November 2022 - Contents
ASHRAE Journal - November 2022 - 3
ASHRAE Journal - November 2022 - 4
ASHRAE Journal - November 2022 - 5
ASHRAE Journal - November 2022 - 6
ASHRAE Journal - November 2022 - 7
ASHRAE Journal - November 2022 - 8
ASHRAE Journal - November 2022 - 9
ASHRAE Journal - November 2022 - 10
ASHRAE Journal - November 2022 - 11
ASHRAE Journal - November 2022 - 12
ASHRAE Journal - November 2022 - 13
ASHRAE Journal - November 2022 - 14
ASHRAE Journal - November 2022 - 15
ASHRAE Journal - November 2022 - 16
ASHRAE Journal - November 2022 - 17
ASHRAE Journal - November 2022 - 18
ASHRAE Journal - November 2022 - 19
ASHRAE Journal - November 2022 - 20
ASHRAE Journal - November 2022 - 21
ASHRAE Journal - November 2022 - 22
ASHRAE Journal - November 2022 - 23
ASHRAE Journal - November 2022 - 24
ASHRAE Journal - November 2022 - 25
ASHRAE Journal - November 2022 - 26
ASHRAE Journal - November 2022 - 27
ASHRAE Journal - November 2022 - 28
ASHRAE Journal - November 2022 - 29
ASHRAE Journal - November 2022 - 30
ASHRAE Journal - November 2022 - 31
ASHRAE Journal - November 2022 - 32
ASHRAE Journal - November 2022 - 33
ASHRAE Journal - November 2022 - 34
ASHRAE Journal - November 2022 - 35
ASHRAE Journal - November 2022 - 36
ASHRAE Journal - November 2022 - 37
ASHRAE Journal - November 2022 - 38
ASHRAE Journal - November 2022 - 39
ASHRAE Journal - November 2022 - 40
ASHRAE Journal - November 2022 - 41
ASHRAE Journal - November 2022 - 42
ASHRAE Journal - November 2022 - 43
ASHRAE Journal - November 2022 - 44
ASHRAE Journal - November 2022 - 45
ASHRAE Journal - November 2022 - 46
ASHRAE Journal - November 2022 - 47
ASHRAE Journal - November 2022 - 48
ASHRAE Journal - November 2022 - 49
ASHRAE Journal - November 2022 - 50
ASHRAE Journal - November 2022 - 51
ASHRAE Journal - November 2022 - 52
ASHRAE Journal - November 2022 - 53
ASHRAE Journal - November 2022 - 54
ASHRAE Journal - November 2022 - 55
ASHRAE Journal - November 2022 - 56
ASHRAE Journal - November 2022 - 57
ASHRAE Journal - November 2022 - 58
ASHRAE Journal - November 2022 - 59
ASHRAE Journal - November 2022 - 60
ASHRAE Journal - November 2022 - 61
ASHRAE Journal - November 2022 - 62
ASHRAE Journal - November 2022 - 63
ASHRAE Journal - November 2022 - 64
ASHRAE Journal - November 2022 - 65
ASHRAE Journal - November 2022 - 66
ASHRAE Journal - November 2022 - 67
ASHRAE Journal - November 2022 - 68
ASHRAE Journal - November 2022 - 69
ASHRAE Journal - November 2022 - 70
ASHRAE Journal - November 2022 - 71
ASHRAE Journal - November 2022 - 72
ASHRAE Journal - November 2022 - Cover3
ASHRAE Journal - November 2022 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FYONLJ
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2024november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2024november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_BDMHLG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WJDGRY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ATMAHK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VHQRAW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XGMDXI
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_YELQLJ
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QJLWMC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_MCDEBX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WNYSQY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XATVOD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FJSHSS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CCBZDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XDEFVG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VHGNBL
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WPKBNJ
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_UUVCDE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTGDEW
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2023
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LKRFXS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AZSOFG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ERCDBH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QWDFRV
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JHGVDF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPUYHG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SREIBM
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LRTGLK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OKRFGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TZSERA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LVRUIX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RPTVYZ
https://www.nxtbook.com/nxtbooks/ashrae/mini_pub_catalog
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XIYTGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2022
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RFGDOB
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PABXNU
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_REMKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PICVBT
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AOYTVW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JQOPLS
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