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Inside a high-tech home with an ultra-low power drain

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Home of Dr. John Eckfeldt and Nancy Schultz, Isabella, Minn. Ms. Schultz did a factory tour prior to buying the Mueller windows, shipped from Germany.

Nancy Schultz

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A view into the main dining area.

Nancy Schultz

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The main dining room, with barrel roof and 30-inch heavy timber framing.

Nancy Schultz

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The high-end kitchen makes no concessions to style.

Nancy Schultz

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Hot water radiators are part of the intricate passive heating system.

Nancy Schultz

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Solar heat collector vacuum tubes on the garage roof.

Nancy Schultz

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An array of tubes and controllers in the basement hints at the technology behind the passive heat system.

Nancy Schultz

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Dr. John Eckfeldt and Nancy Schultz pose beside the plaque confirming the home's LEED platinum status from the U.S. Green Building Council.

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