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I’ve heard solar water heaters are expensive and easily damaged by winter freezes. Is this true?

— Aliya Rodriguez, Olympia Fields, IL

Answered by Cameron Habel on June 18, 2009

Is it possible to combine solar thermal collectors with a hot water on-demand system?

— Francoise LaMonica, Newton, MA

Answered by Ian MacLeod on February 5, 2009

How can I find out whether wind power is a practical option for our location on the Oregon coast?

— Bruce Ferrell, Salem, OR

Answered by Christine and Robert Boles on January 23, 2009

How much will it cost to install solar panels on my 2,000-sq.-ft. home in San Francisco?

— Simon Marla, San Francisco, CA

Answered by Christine and Robert Boles on January 23, 2009

I want to help get my mom's house "off the grid." Where do I start?

— Jackie Mellen, Chipley, FL

Answered by Florian Speier on October 3, 2008

Can you tell me how well solar hot-water heaters work?

— Betsy Humes, Brooklyn, NY

Answered by Paul Rosen on July 17, 2008

I am interested in solar PV. What do you recommend for an old house?

— Exton Quinn, Santa Monica, CA

Answered by Paul Rosen on July 17, 2008

I'd like to power our home with solar and sell the excess back to the grid. Can you help?

— Wendie Hall, Albertville, AL

Answered by Paul Rosen on July 17, 2008

Are geothermal heating/cooling systems better in reducing energy costs than solar power?

— Kimberly

Answered by Mick Dalrymple on June 26, 2008

Can solar work on a northeast-facing house?

— Valerie, Zionsville, Pa.

Answered by Mick Dalrymple on May 22, 2008

 
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