Is it worth it to pay for a Phoenix water heater or buy a condensing tankless water heater?

— Yesim Erke-Magent Allentown, PA

Answered by Harris Woodward on August 4, 2010

Is it better to use a gas or electric heater to back up a solar hot water heater?

— Marge Stevens Corvallis, OR

Answered by Rich Franz-Ünder on July 23, 2010

We use baseboard heat and hot water that comes off an oil furnace: can we supplement with solar water heating?

— Jen H Castine, ME

Answered by David Edwards PhD on June 1, 2010

Will I be able to combine the de-superheater on my geothermal heat pump with my solar water-heating system?

— Jesse Meyer

Answered by Darren Brinkley on March 15, 2010

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 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

Is electric baseboard heat powered by solar panels an efficient choice for our new addition?

— Greg Meyer, Santa Cruz, CA

Answered by Patrick Sheaffer on January 8, 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

 

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