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Airtight Houses Lower Energy Costs

We may not be aware of it, but ordinary family homes in the U.S. and, indeed, the rest of the world are not energy-efficient. Most of their energy goes to heating and cooling, and a lot of it is wasted, as warm and cool air escape through fireplace chimneys and thin or poorly fitting windows and doors, and because of inadequate insulation. A passive house loses almost none. “Imagine a thermos," said real estate developer Brendan O'Neill. "You have insulation...

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