ASHRAE Journal - April 2023 - 14
COLUMN IEQ APPLICATIONS
persons entering the space from clean air environments
(often referred to as visitors or unadapted occupants).
This same research also showed that after some time,
humans become less sensitive to some odors, particularly
body odor, such that 2.5 L/s (5.3 cfm) per person
can control body odor to acceptable levels (referred to as
adapted occupants).
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14
ASHRAE JOURNAL ashrae.o rg A P R I L 2 0 2 3
Bear in mind that the decisions on ventilation rates,
and other requirements, were made in the context of
the standard providing minimum requirements given
the target of adoption by model building codes. This
goal led to the use of the lower value of 2.5 L/s (5.3 cfm)
per person to control body odor as perceived by adapted
and largely sedentary occupants, with higher rates in
spaces with more active occupants
or where their activities generated
more contaminant.
With respect to the building-area
component, the code-intended
goal led to the floor area rates being
based on occupant perception
research in " low-polluting " buildings.
Of course, ventilation can
exceed these minimum requirements.
Higher ventilation rates have
been shown to benefit occupant
health, comfort and productivity as
long as the air is clean and dry.
Despite what we have been hearing
of late, infection control was
discussed extensively in setting the
rates, with many knowledgeable
health professionals engaged. That
discussion concluded that rates to
control airborne disease transmission
could not be defined given the
range of pathogens, infectivity, susceptibility
and other factors. Perhaps
a different conclusion can be
reached as the knowledge base has
since advanced. ASHRAE is tackling
this issue with proposed Standard
241P, Control of Infectious Aerosols. This
standard is on a " fast track " and will
not be an ANSI standard, but it will
be focused specifically on controlling
infectious aerosols to reduce the risk
of disease transmission.
While the requirements in
Standard 62.1 may not be perfect,
they are always open to revision.
Any individual, committee
member or not, can propose
changes to the standard via the
http://www.evapco.com
http://ashrae.org
ASHRAE Journal - April 2023
Table of Contents for the Digital Edition of ASHRAE Journal - April 2023
Contents
ASHRAE Journal - April 2023 - Cover1
ASHRAE Journal - April 2023 - Cover2
ASHRAE Journal - April 2023 - 1
ASHRAE Journal - April 2023 - Contents
ASHRAE Journal - April 2023 - 3
ASHRAE Journal - April 2023 - 4
ASHRAE Journal - April 2023 - 5
ASHRAE Journal - April 2023 - 6
ASHRAE Journal - April 2023 - 7
ASHRAE Journal - April 2023 - 8
ASHRAE Journal - April 2023 - 9
ASHRAE Journal - April 2023 - 10
ASHRAE Journal - April 2023 - 11
ASHRAE Journal - April 2023 - 12
ASHRAE Journal - April 2023 - 13
ASHRAE Journal - April 2023 - 14
ASHRAE Journal - April 2023 - 15
ASHRAE Journal - April 2023 - 16
ASHRAE Journal - April 2023 - 17
ASHRAE Journal - April 2023 - 18
ASHRAE Journal - April 2023 - 19
ASHRAE Journal - April 2023 - 20
ASHRAE Journal - April 2023 - 21
ASHRAE Journal - April 2023 - 22
ASHRAE Journal - April 2023 - 23
ASHRAE Journal - April 2023 - 24
ASHRAE Journal - April 2023 - 25
ASHRAE Journal - April 2023 - 26
ASHRAE Journal - April 2023 - 27
ASHRAE Journal - April 2023 - 28
ASHRAE Journal - April 2023 - 29
ASHRAE Journal - April 2023 - 30
ASHRAE Journal - April 2023 - 31
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ASHRAE Journal - April 2023 - 33
ASHRAE Journal - April 2023 - 34
ASHRAE Journal - April 2023 - 35
ASHRAE Journal - April 2023 - 36
ASHRAE Journal - April 2023 - 37
ASHRAE Journal - April 2023 - 38
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ASHRAE Journal - April 2023 - 40
ASHRAE Journal - April 2023 - 41
ASHRAE Journal - April 2023 - 42
ASHRAE Journal - April 2023 - 43
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ASHRAE Journal - April 2023 - 45
ASHRAE Journal - April 2023 - 46
ASHRAE Journal - April 2023 - 47
ASHRAE Journal - April 2023 - 48
ASHRAE Journal - April 2023 - 49
ASHRAE Journal - April 2023 - 50
ASHRAE Journal - April 2023 - 51
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ASHRAE Journal - April 2023 - 55
ASHRAE Journal - April 2023 - 56
ASHRAE Journal - April 2023 - Cover3
ASHRAE Journal - April 2023 - Cover4
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