Monday, April 30, 2012
Saturday, April 7, 2012
Use of geothermal heat-exchange systems is rising – North Bay Business Journal - North San Francisco Bay Area, Sonoma, Marin, Napa counties - Archive
Use of geothermal heat-exchange systems is rising – North Bay Business Journal - North San Francisco Bay Area, Sonoma, Marin, Napa counties - Archive: "There are some 15,000 to 20,000 operating geothermal systems in Pacific Northwest service areas and perhaps half as many more in California. Some 1.5 million heat pumps are operating in the U.S. today and more than 1 million homes have geothermal heat-exchange systems."
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