These clients grow their own food and wanted a cost-efficient home with minimal carbon footprint that fit their lifestyle and rural property near Columbia, Missouri. The home has a ground-source heat pump and a fan positioned in the central cupola to push rising heat downward in winter and minimize heat loss. Natural light filters through barn-like wooden beams, giving the interiors a serene glow. On one end, an open kitchen, living and dining area connects with a garden workroom. The opposite end holds bedrooms and bathrooms. A covered porch provides outdoor seating overlooking the prairie grass. The homeowners enjoy researching and experimenting as deep green technology evolves. They say the home will always be a work in progress.