
East Meets West: Gas-Fired Heat Pumps
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As the 1990s unfold, look for a new kind of energy-efficient heating and cooling appliance-a heat pump powered by an internal combustion engine that runs on natural gas. [continue reading]

How Tight Are America's Houses?
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Researchers at Lawrence Berkeley National Laboratory (LBNL) recently collected blower door data from across the country to analyze the airtightness of the U.S. housing stock. [continue reading]

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