Does a solar water heater have an AFUE?

— Don Juan Santa Fe, NM

Answered by Rick Goyette on December 9, 2010

I want to convert to solar energy. Where do I start?

— david johnson Stroudsburg, PA

Answered by Anthony Addesso on November 9, 2010

I just installed solar PV on my townhouse. Do I qualify for LEED points?

— Kevin Minogue Palm Beach Gardens, FL

Answered by Danny Kelly on November 7, 2010

I can't afford geothermal. Is an air-to-air heat pump my best option for heating?

— Chris Di Giacomo Shirley, NY

Answered by Randy Potter on October 16, 2010