Healthcare Design - December 2015 - 28


N I
IV
NITIAT

Project: Gundersen Health System,
The Legacy Building, La Crosse, Wis.
Opened: January 2014
Summary: Design for the Legacy Building began in
2007 as part of an overall campus renewal project,
which included building upon Gundersen's longstanding commitment to sustainable design. A year
into the design phase, CEO Jeff Thompson declared
a goal for the entire healthcare system to be net zero
by the end of 2014. On Oct. 14, 2014, the health
system achieved its first day of energy independence
and since then has recorded multiple days where it
has made more clean energy than it has used. The
Legacy Building, designed by AECOM (Los Angeles),
plays a key role in achieving that goal with aggressive energy performance goals, a new geothermal
heat system, and building-wide design features that
had to have a payback of five to 10 years before
they were even considered. "Everything we do has
to have a payback," says Alan Eber, manager of
engineering and energy at Gundersen Health System. "We're not going to go spend money just to be
green; we want to spend money that will ultimately
pay for itself in the future."
What stood out: To help meet the system's
net-zero energy goal, Eber says the project set an
energy target of 100 kBtu per square foot for the
427,000-square-foot hospital. "The architects came
back and said, 'We don't think we can do that,' so we
agreed to 115," Eber says. Still, that number was well
below the average 250 kBtu per square foot that most
hospitals in the region were hitting and thus demanded a "leave no stone unturned" approach to finding the
latest and most efficient energy systems and features
to put in place.
In the end, the building featured walls with
25 percent more insulation than a standard building,
thermally efficient windows, high-efficiency chillers
28

HCDmagazine.com 12.15

and chilled water pumps, a daylight
harvesting system, and-the granddaddy
of them all-a $4 million geothermal heat
system. "There's no question that's the
biggest energy savings we have on the
building," Eber says.
Lessons learned: The building came
out consuming 136 kBtu per square foot,
and today it's hitting 129 kBtu. Eber attributes the need for more fan power and
outdoor air than was originally expected
as part of the reason why Gundersen
hasn't hit its target yet. "There were some
code issues that happened during the construction
of the building and we needed to bring in some more
outdoor air in some areas," he says. "In Wisconsin, that
takes a lot of energy to bring in minus-20-degree air
and heat it up to 70 degrees." In addition, shortly after
opening, the designers realized the building was overlit in some areas, prompting them to use light meters
to determine where fixtures could be removed. "We
probably removed the amount of light we had in our
staffing areas by a third," he says. There were lessons
on the geothermal system, as well, which took about
nine months to achieve efficiency. Since then, Eber
says it's been running smoothly and the investment
is on track to achieve total payback in just over
seven years.
Today, Gundersen continues to adjust the building
systems and is focusing on reducing energy use in
unoccupied areas in the evenings and on weekends
to get it closer to its energy target. It's also considering replacing its T5 fluorescent lighting system with
LEDs by first testing the lamps in its mechanical and
staff rooms. Ideally, Eber says he'd like to see the
Legacy Building cut 5 kBtus per year off its energy
consumption. "Striving to achieve 115 kBtu per
square foot for our new hospital is a big step toward
reaching [energy] independence for consecutive
months and ultimately years," he says.

AECOM

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Table of Contents for the Digital Edition of Healthcare Design - December 2015

Healthcare Design - December 2015
Contents
HCDmagazine.com
Editorial
Show Talk
Monitor
The Center
The Inside Story
Hitting the Mark
View From the Top
Echoing the Landscape
Master Class
Research
Special Supplement: 2015 Remodel/Renovation Competition
Remodel/renovation Competition
Special Advertising Section: Remodel/Renovation Directory
Special Supplement: 2015 Product Innovation Awards
Product Innovation Awards
Special Advertising Section: Product Innovation Gallery
First Look
Healthcare Design - December 2015 - Healthcare Design - December 2015
Healthcare Design - December 2015 - Cover2
Healthcare Design - December 2015 - 1
Healthcare Design - December 2015 - Contents
Healthcare Design - December 2015 - 3
Healthcare Design - December 2015 - HCDmagazine.com
Healthcare Design - December 2015 - 5
Healthcare Design - December 2015 - Editorial
Healthcare Design - December 2015 - 7
Healthcare Design - December 2015 - Show Talk
Healthcare Design - December 2015 - 9
Healthcare Design - December 2015 - Monitor
Healthcare Design - December 2015 - 11
Healthcare Design - December 2015 - 12
Healthcare Design - December 2015 - 13
Healthcare Design - December 2015 - 14
Healthcare Design - December 2015 - 15
Healthcare Design - December 2015 - The Center
Healthcare Design - December 2015 - 17
Healthcare Design - December 2015 - The Inside Story
Healthcare Design - December 2015 - 19
Healthcare Design - December 2015 - 20
Healthcare Design - December 2015 - 21
Healthcare Design - December 2015 - 22
Healthcare Design - December 2015 - 23
Healthcare Design - December 2015 - 24
Healthcare Design - December 2015 - 25
Healthcare Design - December 2015 - Hitting the Mark
Healthcare Design - December 2015 - 27
Healthcare Design - December 2015 - 28
Healthcare Design - December 2015 - 29
Healthcare Design - December 2015 - 30
Healthcare Design - December 2015 - 31
Healthcare Design - December 2015 - View From the Top
Healthcare Design - December 2015 - 33
Healthcare Design - December 2015 - 34
Healthcare Design - December 2015 - 35
Healthcare Design - December 2015 - 36
Healthcare Design - December 2015 - 37
Healthcare Design - December 2015 - Echoing the Landscape
Healthcare Design - December 2015 - 39
Healthcare Design - December 2015 - 40
Healthcare Design - December 2015 - 41
Healthcare Design - December 2015 - 42
Healthcare Design - December 2015 - 43
Healthcare Design - December 2015 - Master Class
Healthcare Design - December 2015 - 45
Healthcare Design - December 2015 - 46
Healthcare Design - December 2015 - 47
Healthcare Design - December 2015 - 48
Healthcare Design - December 2015 - 49
Healthcare Design - December 2015 - Research
Healthcare Design - December 2015 - 51
Healthcare Design - December 2015 - 52
Healthcare Design - December 2015 - Special Supplement: 2015 Remodel/Renovation Competition
Healthcare Design - December 2015 - Remodel/renovation Competition
Healthcare Design - December 2015 - 55
Healthcare Design - December 2015 - 56
Healthcare Design - December 2015 - 57
Healthcare Design - December 2015 - 58
Healthcare Design - December 2015 - 59
Healthcare Design - December 2015 - 60
Healthcare Design - December 2015 - 61
Healthcare Design - December 2015 - 62
Healthcare Design - December 2015 - 63
Healthcare Design - December 2015 - Special Advertising Section: Remodel/Renovation Directory
Healthcare Design - December 2015 - 65
Healthcare Design - December 2015 - 66
Healthcare Design - December 2015 - 67
Healthcare Design - December 2015 - 68
Healthcare Design - December 2015 - 69
Healthcare Design - December 2015 - 70
Healthcare Design - December 2015 - 71
Healthcare Design - December 2015 - 72
Healthcare Design - December 2015 - 73
Healthcare Design - December 2015 - 74
Healthcare Design - December 2015 - Special Supplement: 2015 Product Innovation Awards
Healthcare Design - December 2015 - Product Innovation Awards
Healthcare Design - December 2015 - 77
Healthcare Design - December 2015 - 78
Healthcare Design - December 2015 - Special Advertising Section: Product Innovation Gallery
Healthcare Design - December 2015 - 80
Healthcare Design - December 2015 - 81
Healthcare Design - December 2015 - 82
Healthcare Design - December 2015 - 83
Healthcare Design - December 2015 - 84
Healthcare Design - December 2015 - 85
Healthcare Design - December 2015 - 86
Healthcare Design - December 2015 - 87
Healthcare Design - December 2015 - First Look
Healthcare Design - December 2015 - Cover3
Healthcare Design - December 2015 - Cover4
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