Healthcare Design - September 2014 - 51

50

HCDmagazine.com 09.14

roof that feeds the normal power distribution
for the addition. Both innovations contributed
to the bed tower project achieving 23 out of 24
possible LEED points related to energy.
Brian Horras, project manager at The Beck
Group (Springfield, Mo.), says the team also
decided to push the envelope by using all LED
lighting in the bed tower, rather than more traditional high-performance fluorescent fixtures,
because of the perceived energy and mainte-

Top: A 37 kW photovoltaic
array and a solar hot water
system are installed on the
rooftop of the third bed tower.
The white roofing materials
were chosen to cut down
on solar heat gain. Above:
Regionally sourced stone and
metal panels are prominent
on the building's exterior.

THOMAS MCCONNELL

Digging deeper
During those early discussions, the team started
identifying the LEED points it wanted to go after,
ideas for the building systems, and the financials
as related to payback and value to the owner that
would guide each decision. "We weren't interested
in buying points just to gain points for a certification level," says Nolan Rome, associate principal,
CCRD (Austin, Texas), the MEP engineer on the
project.
The decision target was anything that had a
12 percent rate of return or a six-year payback on
the system, he says. "Anything that exceeded the
payback, we did a life-cycle cost analysis on it,
including utility inflation rate and the owner's cost
of future maintenance, and then looked at it on an
individual basis," he says.
For example, one idea for a rooftop cooling
tower that would use free evaporative cooling in
addition to a heat recovery wheel was shelved because the team was uncertain about maintenance
costs of the complicated system and how it would
hold up over time.
One proposal that did get the green light was
a solar hot water heating system, which operates by running building water through a series of
solar collectors on the roof to preheat the water
before it goes back to the plant, saving about 303
MMBtu annually, Rome says. Another was the
installation of a 26 kW photovoltaic array on the



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Healthcare Design - September 2014

Table of Contents for the Digital Edition of Healthcare Design - September 2014

Contents
Healthcare Design - September 2014 - Cover1
Healthcare Design - September 2014 - Cover2
Healthcare Design - September 2014 - 1
Healthcare Design - September 2014 - 2
Healthcare Design - September 2014 - 3
Healthcare Design - September 2014 - Contents
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