I was just about to buy another CD for some solid return...when I stumbled across geothermal heating. Geothermal is better than an 8% return on investment...without even figuring in the staggering 30% tax credit! What a gold mine...I'm a reader, so I picked up a bunch of books on geothermal....the only one worth reading is McGraw Hill "Geothermal HVAC". It's full of real life usaefull info. I just Googled "Geothermal Book" and it's all over the place.
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