ASHRAE Journal - June 2021 - 2

CONTENTS
June 2021
FEATURES
Minimizing COVID-19
Transmission in High Occupant
Density Settings, Part 2
By David Rothamer, Ph.D.; Scott
Sanders, Ph.D.; Douglas Reindl,
Ph.D., P.E.; Timothy Bertram, Ph.D.
A Global Conversation
About Refrigerant
Regulations, Reductions
By David Doniger; Christina
Theodoridi; Kevin Fay; Stephen
Yurek; Helen Walter-Terrinoni;
Andrea Voigt
Data Centers: Where and How
Should PUE Be Improved?
By Nick Casale, P.E.
12
26
3636
Home Retrofi t Results in Net
Positive Energy Operation
By John Suzukida; Daniel Bacellar;
Reinhard Radermacher, Ph.D.
Technology Award
Innovation, Resiliency
Create Cornerstone of
Offi ce Tower Design
By Shana Scheiber, P.E.;
Roger Lautz, P.E.
DEPARTMENTS
4 Commentary
68 Products
2
6 Industry News
68 Special Products
71 Classifi ed Advertising 72 Advertisers Index
J U N E 2 0 2 1 ashrae .o rg ASHRAE JOURNAL
STANDING COLUMNS
22 IEQ Applications
Managing Aerosols Using
Space Flushing
By Wade H. Conlan, P.E.
Minimizing COVID-19 Transmission
34 Refrigeration Applications
Celebrating Sadi Carnot
By Andy Pearson, Ph.D., C.Eng.
42 Engineer's Notebook
Design ing HVAC for Humid
vs. Arid Climates
By Eric DeSplinter, P.E.;
Jeff Boldt, P.E.
Refrigerant Regulations, Reductions
54 Residential Buildings
How Smart are Today's
Smart Homes?
By Bethany Sparn; Eric Werling
66 HVAC Applications
Return Ductwork Requirement
For Airborne Pathogens
Through the Airstream
By John Constantinide, P.E.;
Christopher Ruch
Improving Data Center PUE
4848
6060
Submissions: ashraejournal.submittable.com/submit
Archive: technologyportal.ashrae.org
Letters: sfoster@ashrae.org
Missing Issue: cservice@ashrae.org
Retrofi tting to Net Positive Energy
ASHRAE® Journal (ISSN 0001-2491) PUBLISHED MONTHLY | Copyright 2021
by ASHRAE, 180 Technology Parkway, Peachtree Corners,
GA 30092. Periodicals postage paid at Atlanta, Georgia, and
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ASHRAE members may submit address changes at www.ashrae.
org/address. POSTMASTER | Send form 3579 to: ASHRAE Journal,
180 Technology Parkway, Peachtree Corners, GA 30092.
Innovation, Resiliency for Offi ce
10 Meetings and Shows
69 InfoCenter
PUBLICATION DISCLAIMER | ASHRAE has compiled this publication
with care, but ASHRAE has not investigated and ASHRAE
expressly disclaims any duty to investigate any product,
service, process, procedure, design or the like which may
be described herein. The appearance of any technical data,
editorial material or advertisement in this publication does not
constitute endorsement, warranty or guarantee by ASHRAE
of any product, service, process, procedure, design or the like.
ASHRAE does not warrant that the information in this publication
is free of errors and ASHRAE does not necessarily agree with
any statement or opinion in this publication. The entire risk of the
use of any information in this publication and its supplement is
assumed by the user.
V O L U M E 63, N O. 6
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ASHRAE Journal - June 2021

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