Re: GEOTHERMAL HEAT/AC
Chuck, you are right about backup. All the systems are designed to provide heat down to a certain temp, then you need a backup source. For example, I looked into heat pumps, and they were only good down to 41 degrees at my location, before you need an auxilary form of heat. USELESS here in the NE. You are also right about calculating your return on investment, thats why i hesitated.
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Dean
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