The Energy Challenge - No Furnaces but Heat Aplenty in Innovative ‘Passive Houses’ - Series - NYTimes.com

The Energy Challenge - No Furnaces but Heat Aplenty in Innovative ‘Passive Houses’ - Series - NYTimes.com: "From the outside, there is nothing unusual about the stylish new gray and orange row houses in the Kranichstein District, with wreaths on the doors and Christmas lights twinkling through a freezing drizzle. But these houses are part of a revolution in building design: There are no drafts, no cold tile floors, no snuggling under blankets until the furnace kicks in. There is, in fact, no furnace."