The house uses passive solar design principles. The main roof faces due north, tilted up at 20 degrees and is designed to take 20KWh of PV panels (it currently has 11KWh installed) and has 1.0m eaves to east and west. There are south facing clearstory windows for summer ventilation plus a heat recovery ventilation system. All external windows and doors are double glazed with FSC hardwood frames.

This spacious, open-plan hemp house pays careful attention to structural elements that allow it to be highly thermally efficient.
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