We have had a great experience both with Dan Rau and the system itself. Our house is all electric due to utility logistics and when we purchased it the heating and cooling system no longer worked. Dan and his crew drilled our holes and installed the pump units very efficiently and professionally. He recommended a heating and cooling contractor to run ducting, etc. who was also great to work with.
We have had the system now for 4 years. It operates well and even in house with poor insulation our bills are very reasonable and the system is comfortable. I am also giving Colorado Geothermal a 6th star because a few months ago I noticed the pressure in the system had dropped and Dan came right out and found the problem, fixed it and left with no charge. Awesome.