ASHRAE Journal - July 2024 - 2

CONTENTS
July 2024
COLUMNS
12 Engineer's Notebook
Natural Gas, Old Buildings, Assumptions
And No Good Deed Goes Unpunished
By Michael Gallagher
52
FEATURES
34 Ducted Heat Pump vs.
Multisplit Heat Pump
By Nelson Fumo, Manoj Bhandari and Jason LeRoy
42 IAQ Paradigms-The Next Generation
By Max Sherman
2024 ASHRAE TECHNOLOGY AWARDS
48 Retro-Commissioning A Hospital for
Sustainability, Cost Savings
By Matt Wade
52 Sustainability, Wellness in a Historic
University Residence Hall
By Lee Harrelson, Tracy Steward and Tyler Larkin
56 Optimizing Reuse of an Iconic
Campus Building
By Jonathan Friedan, Michael Radio and Timothy Hagenbach
Doug Reindl and Stet Sanborn
discuss transitioning to ultralow
GWP refrigerants and how
fl ammable refrigerants impact
refrigeration safety standards.
Michael Gallagher talks about the
monthslong saga to fi x what
started out as a small gas leak
in the furnace room of his
church-just before Christmas.
Cover image from istock.com: André Chagas, TerryJ, ffennema, prescott09, Julia_Sudnitskaya,
LSOphoto, bmcent1, YuraWhite, DenBoma, lawcain, APCortizasJr.
20 Residential Applications
Why is My Zero Energy Home
Not a Zero Carbon Home?
By Philip Fairey and
David B. Goldstein
26 Building Sciences
Below-Grade Water Management
By Joseph W. Lstiburek
30 IEQ Applications
Bioaerosols Assessment and Control,
2nd Edition
By Donald M. Weekes and
Bud J. Offermann
112 Refrigeration Applications
The Giant's Shoulders
By Andy Pearson
DEPARTMENTS
4 Commentary
6 Industry News
8 Letters
10 Meetings and Shows
60 Products
61 Suppliers' New Product Preview
106 Info Center
110 Software Resources
111 Advertisers Index
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V O L U ME 66, NO. 7
ALAN KARCHMER

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ASHRAE Journal - July 2024

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