30 Mar '12, 11am

The Super Shell - GreenBuilder #avlgb

The Super Shell - GreenBuilder #avlgb

Although Germany is light-years ahead in building passive houses where the home’s air infiltration rate is practically airtight, the U.S. is finally starting to catch on. While no match for Europe’s some 20,000 passive homes, a couple dozen construction wonders have been built on U.S. shores, with lots more on the boards. In simplified terms, the passive house standard states that air infiltration cannot exceed 0.6 air changes per hour at 50 pascals, and annual heating and cooling use cannot exceed 4,755 Btu per square foot. By contrast, Energy Star requires less than 5 or 6 air changes per hour, depending on climate zone, and an average home built to current code standards typically consumes more than 10 times as many Btu. In other words, a passive house can actually operate on an astonishing 90% less energy. Although this sounds pie-in-the-sky, it’s actually not. Granted...

Full article: http://www.greenbuildermag.com/News/Green-Building/The-Su...

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