07 May '13, 8pm

@GBAdvisor: Green News: Seeing Passivhaus in a Whole New Way @sgBUILD getting lots of play w his pic!

Designers are accustomed to talking about high-performance houses in a language of abstractions: R-values, triple-pane windows, and blower-door test Test used to determine a home’s airtightness: a powerful fan is mounted in an exterior door opening and used to pressurize or depressurize the house. By measuring the force needed to maintain a certain pressure difference, a measure of the home’s airtightness can be determined. Operating the blower door also exaggerates air leakage and permits a weatherization contractor to find and seal those leakage areas. results. We sort of get it. But this thermal image makes the dramatic difference between a Passivhaus project and conventional construction really easy to understand. The blue rectangle in the midst of all those oranges and reds is New York City's first certified Passivhaus project, a retrofit of a 1899 townhouse in the Pa...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/green-buil...

Tweets

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