ASHRAE Journal - February 2023 - 27
COLUMN IEQ APPLICATIONS
by around an order of magnitude. From these, the
ASHRAE 62.2 committee has chosen three contaminants
of concern that account for more than 83% of all harm:
PM2.5, formaldehyde, and nitrogen dioxide. By controlling
for PM2.5 it is likely that PM10 is also controlled. The
other parameters were not included because they are
principally outdoor contaminants or are otherwise not
addressed by the existing ventilation rate procedure.
But how should these be included in the standard?
Engineers will be reassured that they won't ever have to
consider the DALY metric. The harm intensities provide
a relative weight of each contaminant that can be used
to create a harm budget where the total harm caused
by exposure to them is below an acceptable threshold.
The data continues to be extended and analyzed, but for
now, the reference concentrations for PM2.5, formaldehyde
and nitrogen dioxide are 8, 20 and 6 micrograms
per cubic meter, respectively.
The defi nition of acceptable IAQ in 62.2 is constant
and has binary outcomes. A building either has
acceptable IAQ or it does not. The proposed addendum
to determine acceptability represents a signifi cant
change in thinking and in the use of evidence
because, for the fi rst time, harm from exposure to IAQ
contaminants is used as a basis for regulation.
Acknowledgments
This work was supported by a University of
Nottingham Faculty of Engineering Research Excellence
Scholarship and by the Chartered Institution of Building
Services Engineers.
The author is grateful to Max Sherman, Constanza
Molina and Giobertti Morantes for their comments.
References
1. AIVC. 2017. " Ventilation Information Paper 36: Metrics of Health
Risks from Indoor Air. " Air Infi ltration and Ventilation Centre.
2. AIVC. 2016. " TN 68: Residential Ventilation and Health. " Air
Infi ltration and Ventilation Centre. "
3. Logue, J.M., P.N. Price, M.H. Sherman, B.C. Singer. 2012. " A
Method to Estimate the Chronic Health Impact of Air Pollutants in
U.S. Residences. " Environmental Health Perspectives 120(2):216 - 222.
4. IEA. Energy in Buildings and Communities Programme. Annex
86 - Energy Effi cient Indoor Air Quality Management in Residential
Buildings. www.annex86.iea-ebc.org
F E B R U A RY 2 0 2 3 ashrae.o rg ASHRAE JOURNAL
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http://www.annex86.iea-ebc.org
http://www.micrometl.com
http://www.ashrae.org
ASHRAE Journal - February 2023
Table of Contents for the Digital Edition of ASHRAE Journal - February 2023
Contents
ASHRAE Journal - February 2023 - Intro
ASHRAE Journal - February 2023 - Cover1
ASHRAE Journal - February 2023 - Cover2
ASHRAE Journal - February 2023 - 1
ASHRAE Journal - February 2023 - Contents
ASHRAE Journal - February 2023 - 3
ASHRAE Journal - February 2023 - 4
ASHRAE Journal - February 2023 - 5
ASHRAE Journal - February 2023 - 6
ASHRAE Journal - February 2023 - 7
ASHRAE Journal - February 2023 - 8
ASHRAE Journal - February 2023 - 9
ASHRAE Journal - February 2023 - 10
ASHRAE Journal - February 2023 - 11
ASHRAE Journal - February 2023 - 12
ASHRAE Journal - February 2023 - 13
ASHRAE Journal - February 2023 - 14
ASHRAE Journal - February 2023 - 15
ASHRAE Journal - February 2023 - 16
ASHRAE Journal - February 2023 - 17
ASHRAE Journal - February 2023 - 18
ASHRAE Journal - February 2023 - 19
ASHRAE Journal - February 2023 - 20
ASHRAE Journal - February 2023 - 21
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ASHRAE Journal - February 2023 - 24
ASHRAE Journal - February 2023 - 25
ASHRAE Journal - February 2023 - 26
ASHRAE Journal - February 2023 - 27
ASHRAE Journal - February 2023 - 28
ASHRAE Journal - February 2023 - 29
ASHRAE Journal - February 2023 - 30
ASHRAE Journal - February 2023 - 31
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ASHRAE Journal - February 2023 - 33
ASHRAE Journal - February 2023 - 34
ASHRAE Journal - February 2023 - 35
ASHRAE Journal - February 2023 - 36
ASHRAE Journal - February 2023 - 37
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ASHRAE Journal - February 2023 - 71
ASHRAE Journal - February 2023 - 72
ASHRAE Journal - February 2023 - Cover3
ASHRAE Journal - February 2023 - Cover4
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