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Energy-Efficient Buildings Can Offer Paradoxical Results, Speakers SayMontreal — Here at the Society for College and University Planning’s annual conference, designers from Moseley Architects took a close (and, some might argue, courageous) look at the performance of some of the buildings they had designed for Virginia universities under the Leadership in Energy and Environmental Design program. The buildings were, for the most part, successes — with some interesting caveats. The Moseley designers, Bryna Dunn and George Nasis, presented data on buildings at the College of William and Mary, Longwood University, Old Dominion University, and the University of Mary Washington. The building at Longwood was the highest-rated structure of the bunch, having attained LEED gold. In each case, Ms. Dunn and Mr. Nasis examined how the buildings had performed compared with the LEED projections for their performance, performance standards under the American Society of Heating, Refrigerating, and Air-Conditioning Engineers, and, if the project was a renovation, its pre-renovation performance. In most cases, the new or renovated buildings met or outperformed the predictions and standards, the designers said, and any extra money laid out for LEED design will pay for itself within a few years. But there were interesting anomalies. For example, the building for the University of Mary Washington’s graduate college performed worse than the predictions and the standards from April to September. Why? The designers had specified a smaller chiller, but a larger one was installed. The university plans to replace the chiller, Ms. Dunn said. Ms. Dunn also compared the energy use of the LEED buildings against the average building’s performance on each campus. But here, too, was a curious finding. Except in the case of Old Dominion, the LEED buildings performed at about the same level as the campus average — or worse. That was because most other buildings on the campuses had not been renovated, a step that would add electrical plugs, lighting, and air conditioning — a major energy hog. One paradox of campus renovation, well known among facilities managers, is that a renovated building will often suck more energy, even if it features energy-efficient technology. But, Ms. Dunn said, such gauges were measuring only a building’s energy performance, not its water conservation, occupant satisfaction, or marketing value. Surveys of occupants have found that they were generally happy with the appearance and atmosphere of the building. But again, there was one compelling anomaly: Thermal comfort always rated poorly compared with other categories. Ms. Dunn said that was probably because half of the people are too cold most of the time, and half are too hot. Scott Carlson | Tuesday July 22, 2008 | Permalink | Contact usComments
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The last cryptic sentence needs an explanation.
Maybe it means that people EXPECT to be comfortable in a new building, and are annoyed when they are not?
— wing Jul 22, 04:41 PM #
As anyone who has ever physically overseen a building knows, at any given temperature (say, 72 degrees F), half the people will say it’s too cold and half the people will say it’s too hot.
— thermostat czar Jul 22, 06:20 PM #
There is nothing in the LEED ratings credits that guarantees thermal comfort (or much else user centered design). If one wanted to be perverse about it, one could avoid all of those credits which impact occupant comfort or benefits in any way, and still get a Platinum rating. Fortunately, most LEED savvy architects know something about people, too.
— jbrd Jul 22, 08:01 PM #
LEED ratings are a joke – Higher Ed should insist on zero energy footprint for all new buildings if we are truly leading the way.
— John Jul 23, 07:14 AM #