Exterior, Metal Roof Material, Metal Siding Material, House Building Type, Wood Siding Material, Gable RoofLine, Shed RoofLine, and Saltbox RoofLine An 8-kW solar array powers the majority of the home's annual energy use, while a five-ton geothermal system provides mechanical heating and cooling. A 30,000-gallon rainwater collection system feeds the home with 200 gallons of purified water daily.

  Lucy Wang’s Saves from A Stellar Sustainable Home Is Built on a Surprisingly Low Budget

Lucy Wang’s Saves

An 8-kW solar array powers the majority of the home's annual energy use, while a five-ton geothermal system provides mechanical heating and cooling. A 30,000-gallon rainwater collection system feeds the home with 200 gallons of purified water daily.