In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
As much as I love my Thursday new letter. this one is simply not true.
Henry Gifford does a great job explaining this one http://www.greenbuildingadvisor.com/blogs/dept/green-building-blog/ground-source-heat-pumps-don-t-save-energy
"If you can't explain it simply, you don't understand it well enough"