Nature's Way

Washington University’s research and education center outside of St. Louis aims to meet goals of net zero energy and net zero water use. Composting toilets require no water for flushing, and a rainwater harvesting and treatment system provides potable water. The building nearly reached net zero energy use in its first year of operation. Additional photovoltaic panels, added insulation, caulking and sealing to reduce infiltration, and HVAC operation adjustments are expected to help the building’s energy production exceed its energy use during its second year. Trees from the property that were removed as part of a forest restoration project or that fell during storms provided wood for the siding, eaves and floors.

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