The Double-Envelope House

Probably no solar design has created so much discussion, and so many happy occupants.



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The Whittle family enjoys one of their first evenings in their new energy-conserving double-envelope home.
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Custom kitchen cabinetry is a highlight of the structure's aesthetic side.
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The double-envelope house is characterized by its large south-facing glass area and its clerestory windows at the roof peak.
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Alternative Builders incorporates a vestibule on almost every house the firm builds.
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This view from west to east in the solarium shows the second-story balcony, the floor slots for convective loop flow, and plenty of healthy greenery.
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Part of Alternative Builders' crew.
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Whittle double envelope, cross section near east end.
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