http://www.hotfrog.com/Companies/HVAC-Tax-Credit/RSSUpdated every minute of every dayen-usCopyright: (C) Reed Business Information.http://www.hotfrog.com/Companies/HVAC-Tax-Credit/Geothermal-Air-Conditioning-14724   Egg Geothermal Heating and Cooling Systems achieve Energy Efficiency Ratings in the 30's.  When you consider the Return on Investment in energy savings (up to 50% or more) coupled with unprecedented tax credits, you can't afford to put your money anywhere else!yyyy-MM-dd