Which is more energy efficient: central AC or in-window air conditioners?

— Laura Bianchi Payne Cupertino, CA

Answered by Randy Potter on February 27, 2011

Which one is better in the attic: cellulose or rigid foam board?

— Felix Laredo, TX

Answered by Randy Potter on January 27, 2011

Would you recommend passive solar design for North Texas?

— tungtruong Grand Prairie, TX

Answered by Randy Potter on January 6, 2011

Which way should we orient our green home in Boca Raton, FL?

— MH Holliston, MA

Answered by Randy Potter on December 9, 2010

What is the best product to use to get oil off my driveway?

— Della Barrett Clermont, FL

Answered by Randy Potter on November 19, 2010

Is there a system on the market that recycles used shower water back to the showerhead?

— Grant Arnold Falls Church, VA

Answered by Randy Potter on November 14, 2010