Why aren't solar water heaters more popular in the U.S., even in solar-friendly states like California?
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Primary Advantages & Disadvantages of Solar Water Heaters
Pick the Best Solar Water Heater for Your Home – Mother Earth News
Solar Water Heaters: Switch to This Alternative to Save Energy (and Money) - CNET
Installing solar water heater at home - Ideas by Mr Right
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Solar Water Heaters | Department of Energy
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