ASHRAE Journal - October 2021 - 7

INDUSTRY NEWS
thermal environments. This may partly be because we
sleep in a distinct microclimate underneath bedclothes,
not in the actual room environment per se.
Bedroom air quality tells a different story; a simple,
objective measurement of bedroom air quality (namely
CO2 concentration) deteriorates throughout the course
of our sleep, particularly in rooms having minimal air
change rates. Upon waking, our subjective impression
of the air quality, or " air freshness, " during our sleep is
dominated by our immediate perceptions upon waking,
when objective conditions are likely to be their worst.
While that immediate air quality impression upon waking
may differ from the average air quality of the bedroom
throughout the sleep period, it is still correlated. Our
subjective perceptions of " air freshness " are statistically
associated with objective ventilation rate (CO2).
So, what is the connection between bedroom environmental
quality (thermal and IAQ) and sleep quality?
First, we found that objective thermal conditions in the
bedroom were associated with objective sleep quality
metrics (i.e., measurement by wearable sleep-trackers),
whereas subjective thermal comfort assessments were
not. However, objective IAQ (CO2) in the bedroom was
associated with objective sleep quality metrics, as was
subjective IAQ ( " air freshness " ) with subjective sleep
quality ratings.
Read the full Q&A: https://tinyurl.com/bjbmbuwz
Can Past Failures Create
TomorrowÕs Buildings?
" We need to be able to be more
honest about what doesn't work and
share those failures so that our next
projects can be better, " says John
Straube, Ph.D., P.Eng., Associate Member ASHRAE.
Listen to Straube and Joseph Lstiburek, Ph.D., P.Eng.,
Fellow ASHRAE, discuss why human judgment is critical
to a better built environment, on the latest episode
of ASHRAE Journal Podcast.
Listen at ashrae.org/podcast or wherever you get
your podcasts.
Improve Your IAQ. Improve Your Productivity.
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O CTO B E R 2 0 2 1 ashrae.o rg ASHRAE JOURNAL
7
https://www.tinyurl.com/bjbmbuwz http://www.ashrae.org/podcast http://www.cambridgeair.com http://ashrae.org

ASHRAE Journal - October 2021

Table of Contents for the Digital Edition of ASHRAE Journal - October 2021

Contents
ASHRAE Journal - October 2021 - Intro
ASHRAE Journal - October 2021 - Cover1
ASHRAE Journal - October 2021 - Cover2
ASHRAE Journal - October 2021 - 1
ASHRAE Journal - October 2021 - Contents
ASHRAE Journal - October 2021 - 3
ASHRAE Journal - October 2021 - 4
ASHRAE Journal - October 2021 - 5
ASHRAE Journal - October 2021 - 6
ASHRAE Journal - October 2021 - 7
ASHRAE Journal - October 2021 - 8
ASHRAE Journal - October 2021 - 9
ASHRAE Journal - October 2021 - 10
ASHRAE Journal - October 2021 - 11
ASHRAE Journal - October 2021 - 12
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ASHRAE Journal - October 2021 - 14
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ASHRAE Journal - October 2021 - 17
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ASHRAE Journal - October 2021 - 21
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ASHRAE Journal - October 2021 - 37
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ASHRAE Journal - October 2021 - 50
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ASHRAE Journal - October 2021 - 60
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ASHRAE Journal - October 2021 - 71
ASHRAE Journal - October 2021 - 72
ASHRAE Journal - October 2021 - HR1
ASHRAE Journal - October 2021 - HR2
ASHRAE Journal - October 2021 - HR3
ASHRAE Journal - October 2021 - HR4
ASHRAE Journal - October 2021 - HR5
ASHRAE Journal - October 2021 - HR6
ASHRAE Journal - October 2021 - HR7
ASHRAE Journal - October 2021 - HR8
ASHRAE Journal - October 2021 - HR9
ASHRAE Journal - October 2021 - HR10
ASHRAE Journal - October 2021 - HR11
ASHRAE Journal - October 2021 - HR12
ASHRAE Journal - October 2021 - HR13
ASHRAE Journal - October 2021 - HR14
ASHRAE Journal - October 2021 - HR15
ASHRAE Journal - October 2021 - HR16
ASHRAE Journal - October 2021 - HR17
ASHRAE Journal - October 2021 - HR18
ASHRAE Journal - October 2021 - HR19
ASHRAE Journal - October 2021 - HR20
ASHRAE Journal - October 2021 - HR21
ASHRAE Journal - October 2021 - HR22
ASHRAE Journal - October 2021 - HR23
ASHRAE Journal - October 2021 - HR24
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ASHRAE Journal - October 2021 - 76
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ASHRAE Journal - October 2021 - 81
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ASHRAE Journal - October 2021 - 96
ASHRAE Journal - October 2021 - Cover3
ASHRAE Journal - October 2021 - Cover4
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