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BASF has opened what it is billing as a "zero heating cost" house in Ludwigshafen, Germany. The renovated apartment block incorporates Neopor expandable polystyrene insulation panels, triple-glazed windows, and solar panels on the roof and facade. BASF says the building is a pilot project for other residences in Ludwigshafen, where it holds about 8,000 apartments. In 2001, the company opened the "3-liter-house," which can be heated with only 3 L of fuel oil annually per square meter of floor space.
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