April 11, 2008 6:18 PM PDT
The entry level opens to a spacious, blue hot tub with garden views and a sauna several steps away. The water and radiant-floor heating are fed warmth via rooftop solar panels. Hot water is stored within 150 tubes and a 450-gallon tank.
Lochinvar Knight provides an energy-efficient boiler that serves as backup to the solar heating system. A tankless, on-demand water heater from Takagi also reduces energy waste up to 80 percent, according to Wilson.
Photo by Corinne Schulze/CNET Networks
