Form.  Designed by Wendy Ing, the compact form helps to reduce the heat loss from the building envelope (the two-story house was designed with a rectangular shape). The angle and line of the roof, which faces due south, was designed to maximize solar exposure for the 6.3kW photovoltaic system. Large windows face northwest for the mountainous views, while on  the south-facing façade additional large windows supply most of the heat.

Systems.  Mini-split heat pumps suppliment the home's passive solar gain in the winter, and provide cooling in the summer. Sliding shutters on the southeast and southwest facing windows reduce summer solar heat gains. A separately ducted heat-recovery ventilator (HRV) provides continuous fresh air. 

Envelope.  The wall assembly is a combination of Insulated concrete forms (ICFs) and interior 2x4 stud walls filled with dense-packed cellulose. The roof incorporates 20 inches of loose fill cellulose insulation in the trusses. The airtightness membrane spans the interior of the roof trusses and hangs into the top of the ICF walls where the concrete was poured to creating an uninterrupted air barrier.