Healthcare Design - September 2017 - 47

IN FO C U S
S T R A T E G I C A P P R O A C H E S to D E S I G N C H A L L E N G E S

ENGINEERING

DAVID SENIOR

W I N D S O F C H A N G E 

As ASHRAE considers recommending the use of natural
ventilation in healthcare environments, two early adopters share
how their efforts are faring By Katharine Logan 

ALMOST WITHOUT EXCEPTION, North American
hospitals are mechanically cooled and ventilated-but change is in the air. At the 2017 ASHRAE
Annual Conference in June, the society's natural
ventilation task group presented recommendations
from its three-year review of the ASHRAE standard
for ventilation in healthcare facilities. In a significant shift, the task group suggested that natural ventilation-which it defines as the transport of fresh
air through non-mechanical means-should be allowed in most spaces outside of operating rooms
and other critical care areas. "We should open the
door to this," says Travis English, chief design engineer for Kaiser Permanente (Anaheim, Calif.) and a
member of the task group. "We should have the option to evaluate it case by case."  
ASHRAE standards define conventional industry practices for engineers in the U.S. Many jurisdictions have adopted the current ASHRAE Standard
170: Ventilation of Health Care Facilities, in whole
or in part, that requires that "all air provided to a
space shall be filtered" and that "the entire minimum outdoor air changes per hour ... shall meet the
filtration requirements."
The group's recommendation reflects the North
American design culture's growing interest in natural ventilation, which is being driven by research
on the benefit of fresh air to patients, the need for
more energy-efficient and resilient buildings, and
increasing awareness of naturally ventilated healthcare facilities internationally. "Some have seen the
models of natural ventilation used in hospitals in
the U.K., and asked, 'Why not consider this for the
U.S.?'" says Paul Ninomura, a design engineer with
the Indian Health Service (Seattle) and lead author
of the Standard 170 task group's position paper.
In Singapore, Ng Teng Fong General Hospital and
Jurong Community Hospital incorporate operable
windows and a unique fan-shaped ward layout so
that more than 80 percent of the inpatient areas receive natural ventilation. (For more on the project,
read "Breath of Fresh Air" on page 38.) In awarding
the project a 2017 AIA COTE Top Ten Award by the
American Institute of Architects Committee on
the Environment (COTE), the awards jury noted
that its passive design strategies are a model for
hospitals around the world.  
In North America, a handful of early
adopters have navigated existing technical and cultural obstacles to natural

SEPTEMBER 2017

47



Table of Contents for the Digital Edition of Healthcare Design - September 2017

Healthcare Design - September 2017
Contents
Editorial
The HCD 10
From the Publisher
Class Project
5 Strategies for Ambulatory Facility Planning
Making Room for Wound Care
First Look
Breath of Fresh Air
Engineering Winds of Change
Product Spotlight Wayfinding
The Center
Face Time
HCD Expo 2017
Healthcare Design - September 2017 - Healthcare Design - September 2017
Healthcare Design - September 2017 - Cover2
Healthcare Design - September 2017 - 1
Healthcare Design - September 2017 - Contents
Healthcare Design - September 2017 - 3
Healthcare Design - September 2017 - 4
Healthcare Design - September 2017 - 5
Healthcare Design - September 2017 - 6
Healthcare Design - September 2017 - 7
Healthcare Design - September 2017 - 8
Healthcare Design - September 2017 - Editorial
Healthcare Design - September 2017 - The HCD 10
Healthcare Design - September 2017 - From the Publisher
Healthcare Design - September 2017 - 12
Healthcare Design - September 2017 - Class Project
Healthcare Design - September 2017 - 14
Healthcare Design - September 2017 - 15
Healthcare Design - September 2017 - 5 Strategies for Ambulatory Facility Planning
Healthcare Design - September 2017 - Making Room for Wound Care
Healthcare Design - September 2017 - 18
Healthcare Design - September 2017 - First Look
Healthcare Design - September 2017 - 20
Healthcare Design - September 2017 - 21
Healthcare Design - September 2017 - 22
Healthcare Design - September 2017 - 23
Healthcare Design - September 2017 - 24
Healthcare Design - September 2017 - 25
Healthcare Design - September 2017 - 26
Healthcare Design - September 2017 - 27
Healthcare Design - September 2017 - 28
Healthcare Design - September 2017 - 29
Healthcare Design - September 2017 - 30
Healthcare Design - September 2017 - 31
Healthcare Design - September 2017 - 32
Healthcare Design - September 2017 - 33
Healthcare Design - September 2017 - 34
Healthcare Design - September 2017 - 35
Healthcare Design - September 2017 - 36
Healthcare Design - September 2017 - 37
Healthcare Design - September 2017 - Breath of Fresh Air
Healthcare Design - September 2017 - 39
Healthcare Design - September 2017 - 40
Healthcare Design - September 2017 - 41
Healthcare Design - September 2017 - 42
Healthcare Design - September 2017 - 43
Healthcare Design - September 2017 - 44
Healthcare Design - September 2017 - 45
Healthcare Design - September 2017 - 46
Healthcare Design - September 2017 - Engineering Winds of Change
Healthcare Design - September 2017 - 48
Healthcare Design - September 2017 - 49
Healthcare Design - September 2017 - Product Spotlight Wayfinding
Healthcare Design - September 2017 - 51
Healthcare Design - September 2017 - The Center
Healthcare Design - September 2017 - 53
Healthcare Design - September 2017 - 54
Healthcare Design - September 2017 - 55
Healthcare Design - September 2017 - Face Time
Healthcare Design - September 2017 - Cover3
Healthcare Design - September 2017 - Cover4
Healthcare Design - September 2017 - HCD Expo 2017
Healthcare Design - September 2017 - Expo2
Healthcare Design - September 2017 - Expo3
Healthcare Design - September 2017 - Expo4
Healthcare Design - September 2017 - Expo5
Healthcare Design - September 2017 - Expo6
Healthcare Design - September 2017 - Expo7
Healthcare Design - September 2017 - Expo8
Healthcare Design - September 2017 - Expo9
Healthcare Design - September 2017 - Expo10
Healthcare Design - September 2017 - Expo11
Healthcare Design - September 2017 - Expo12
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