What is the upfront cost of an Energy Star-qualified home?

— Jon Morganton, NC

Answered by Danny Kelly on June 21, 2010

What is the best building design for a house built on clay soil?

— Jim Gilmartin Gainesville, FL

Answered by David Edwards PhD on June 17, 2010

Do we still need ductwork in a passive home?

— Ihab Riad Prospect Heights, IL

Answered by Erik Henry on May 19, 2010