The ventilation shafts of the windcatcher reach several feet above the roof to pull cooler outdoor air inside.
2. Photovoltaic array
Solar panels extend down the sloped roof, capturing energy for heating and lighting the house.
3. Efficient insulation
The building's super-effective insulation is integral to the home's overall efficiency.
4. Biomass boilers
Biomass boilers run on low-cost, renewable organic waste material, such as compressed sawdust cast off from the timber industry.