What are the next heating/cooling advancements beyond geothermal?

— Tom M. Rocky Hill, CT

Answered by Lucas Johnson on September 25, 2012

How do I reduce the heat entering through top floor windows on the west side?

— Baron Dallas, TX

Answered by Erik Henry on September 11, 2012

What is the best green insulation?

— Nancy Wilson San Diego, CA

Answered by Danny Kelly on July 24, 2012