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"Inside a rather humdrum-looking suburban Washington, D.C., home, the typical family of 4 is replaced by a virtual clan as part of a $2.5M effort to test energy-efficient technologies and materials."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/blogs/lab-sweet-lab-nist-net-zero-energy-residential-test-facility-opens>