The document summarizes a session attended at the MiaGreen conference. The scheduled speakers for a session on recycling business models were absent, so the attendee moved to a session on high-performing buildings presented by Noah Eckhouse. Noah outlined five "canons" or principles for achieving energy efficient buildings: be wary of misleading claims, hard work is required not shortcuts, consider obvious factors, learn from others' mistakes, and use professional tools. Noah then demonstrated using modeling software to simulate retrofits on a sample building, finding that some common solutions like central HVAC were not as effective as improved windows or chilled beams. The modeling allowed evaluating different options without actual construction costs.

1. miagreen session 3 1
review: MiaGreen session 3
For the third session of the day, I planned to attend The Recycling Business:
Entrepreneurial Inspiring Models, but, sadly, the co-founders of Ecoist, who were slated as
two of the three speakers, were not present, nor was anyone taking their place. So, I
instead moved over to Truly High Performing Buildings: Tools and Techniques for Getting It
Right, which was presented by Noah Eckhouse, the Vice President of the Building
Performance Group for Bentley Systems.
My late arrival prevented me from hearing the set-up and introduction to his session, but I
still caught what the presenter called the “canons” for achieving energy efficient, high-
performing buildings. They were:
• Thou Shalt Not Believe the Greenwashing
• Thou Shalt Not Avoid Hard Work
• Thou Shalt Not Overlook the Obvious
• Thou Shalt Learn From Others Before You
• Use The Best Tools & Don’t Work Alone
While pretty self-explanatory, Noah still elaborated on them. There are a lot of technologies
out there, and even practitioners, who make promises they cannot deliver, or which cannot
be attained when their system or service is considered as part of the whole, so he
cautioned the audience to do their research and not blindly believe what anyone says. That
leads directly into point number two: there are no easy solutions. Do not rely on shortcuts,
do not read “top 10” lists of green building advice and believe that you know how to design
and actually create green buildings. The most simple formula to keep in mind, he said, is
“garbage in = garbage out.” Always keep your brain engaged, and allow yourself to detect
obvious missteps. Here he showed images of solar panel arrays installed behind shading
elements which prevent most of the available sunlight from reaching those panels.
Whoever was leading those projects didn’t stop to consider that trees, for example, are not
transparent. So the presenter encouraged us to be wary of what he called “one click
solutions.” Solar panels are great, but they will do nothing if improperly used. Thus, they
are not a solution unto themselves.
And when such mistakes are made, everyone must learn from them. There are already
buildings whose design intended them to be high-performing, and they have gotten a lot of
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2. miagreen session 3 2
hype, but, once constructed, they have fallen far below expectations. We must learn,
therefore, that good design does not equal good performance. He advised the audience to
beware of LEED tunnel vision, saying that there are at least 50% of certified buildings that
are barely at or below the code baseline. Simply designing a building to comply with the
certification requirements will not actually get you the desired results.
So how can someone get a high-performing building? Noah advised that all parties
involved in the project get together at the very beginning; this is the simplest way to avoid
losses. Everyone from conceptual designers, to engineers, to operators should be on-
board with the plans. And it is important that the entire team be working with professional
grade tools. He mentioned the U.S. Department of Energy’s EnergyPlus, and Bentley’s Tas
Simulator V8i as examples of software that can help engineer the performance of a
building before an actual structure is touched. EnergyPlus is programmed to model
heating, cooling, ventilating, lighting, and other building energy flows. The Tas Simulator
can perform external shadows and internal sun paths studies.
As a quick case study, Noah undertook the virtual retrofit of a random building in
Massachusetts using the Tas Simulator V8i. Through Google Maps, he picked a 1950s
structure in Amherst, and walked us through what changes he could make to it to get
better energy efficiency. The results were rather surprising. Through trial and error, he was
able to achieve a 25% energy efficiency level, but he did it without too many bells and
whistles. Better windows yielded a huge gain, but a central HVAC system did just the
opposite, eating up all the gains in efficiency. External window shades turned out to be
pretty much useless, while chilled beams got the model closer to the 25% efficiency level.
The benefits of this study were quite evident: you can essentially play with every aspect of
a structure, incrementally building up to the best possible model. And if you make mistakes
along the way, you are not stuck with them and they don’t cost you any money. It was
rather clear that some of the solutions we might consider absolutely necessary for a high-
performing building don’t always yield great solutions, so really no single system should be
locked in. Energy modeling can show you where to invest your resources for maximum
impact.
Thank you, Noah, for this lively and informative session!
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