What is the most efficient source of additional heating to supplement my home's gas furnace?

— chris bacogiannis Walnut Creek, CA

Answered by Lucas Johnson on February 26, 2013

What are the next heating/cooling advancements beyond geothermal?

— Tom M. Rocky Hill, CT

Answered by Lucas Johnson on September 25, 2012

When I leave for vacation what should I do before I leave to save energy?

— Adam Clayton Bostwick, FL

Answered by Lucas Johnson on August 7, 2012