How can I build a home that self-maintains year round comfort without commercial power?

Use your home itself to collect free solar heat all summer.

• Cool your home passively, while heating the earth around your home, without machinery and off grid.
• Keep your home cozy all winter by retrieving heat from the soil.
• Utilize the free solar heat stored throughout the summer as a year round natural thermal resource.
• Power a convection ventilation system using stored heat that provides warm air all winter and cool air all summer. [Read more...]