ASHRAE Journal - December 2020 - 2

CONTENTS

DECEMBER 2020

FEATURES

STANDING COLUMNS

What You Can and Can't Do
With ASHRAE Standard 52.2
By Kathleen Owen;
Carolyn (Gemma) Kerr, Ph.D.

52 Engineer's Notebook
Learning a Vocabulary for
Acoustics Fundamentals

18

By Jeff Boldt, P.E.; David Wright

58 Building Sciences
If You Want to Save Cash...
Flash

Understanding Standard 52.2

By Joseph W. Lstiburek, Ph.D., P.Eng.

How Effective are Mixing Boxes
At Performing the Economizer
Function?
By Stephen Welty, P.E.;
Ricardo Ortiz

63 IEQ Applications
Controlled Environments:
Room Pressure, Flow
Offset, Airtightness and
Pressurization Strategies

22

By Wei Sun, P.E.

72 Refrigeration Applications
Oh, What a Year!

Mixing Boxes & Economizer Function

By Andy Pearson, Ph.D., C.Eng.

DEPARTMENTS

30

Continuous Improvement

Effect of Ventilation and
Filtration on Viral Infection in
Residences
By Hoy Bohanon, P.E.;
Marwa Zaatari, Ph.D.

38

Ventilation and Filtration Effect

Technology Award
Modular Heat-Recovery Chiller
Drives College Laboratory
Savings
By Ben Hobbs, P.E.

46

College Laboratory Energy Savings

2

D ECEM BER 2020

ashrae.org

ASHRAE JOURNAL

4 Commentary 6
8 Letters

ROY KALTSCHMIDT, LBNL

LBNL's High Performance
Computing Center:
Continuously Improving Energy
And Water Management
By Jingjing Liu, P.E.;
Norman Bourassa

Industry News

16 Meetings and Shows

120 Products

126 InfoCenter

127 Classiﬁed
Advertising

128 Advertisers
Index

Special Sections
73 Sustainable Products Capabilities
122 2020 Indices
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Missing Issue: cservice@ashrae.org
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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
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ASHRAE does not warrant that the information in this publication
is free of errors and ASHRAE does not necessarily agree with
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VO LU M E 62, N O. 12
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ASHRAE Journal - December 2020

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