No Furnaces but Heat Aplenty in ‘Passive Houses’ [View All]

[BR_Parkway]

http://www.nytimes.com/2008/12/27/world/europe/27house.html?pagewanted=1&em


In Berthold Kaufmann’s home, there is, to be fair, one radiator for emergency backup in the living room — but it is not in use. Even on the coldest nights in central Germany, Mr. Kaufmann’s new “passive house” and others of this design get all the heat and hot water they need from the amount of energy that would be needed to run a hair dryer.

“You don’t think about temperature — the house just adjusts,” said Mr. Kaufmann, watching his 2-year-old daughter, dressed in a T-shirt, tuck into her sausage in the spacious living room, whose glass doors open to a patio. His new home uses about one-twentieth the heating energy of his parents’ home of roughly the same size, he said.

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There are now an estimated 15,000 passive houses around the world, the vast majority built in the past few years in German-speaking countries or Scandinavia.

The first passive home was built here in 1991 by Wolfgang Feist, a local physicist, but diffusion of the idea was slowed by language. The courses and literature were mostly in German, and even now the components are mass-produced only in this part of the world.

The industry is thriving in Germany, however — for example, schools in Frankfurt are built with the technique.

Moreover, its popularity is spreading. The European Commission is promoting passive-house building, and the European Parliament has proposed that new buildings meet passive-house standards by 2011.