I've had three geothermal systems installed by Ground Source since 2010, and they have all been working wonderfully. There has been occasional maintenance items needed, and one of my systems is installed at a telecommunication site, which when it has issues, it becomes critical. I like how I can call the office and tell them it's an emergency and they will juggle scheduling around to get a technician out right away to take care of the critical site and if I have a normal or less urgent issue, it can be scheduled normally. Their rates are very reasonable and in line with other HVAC maintenance staff I have at other locations across the Midwest. When they did the very first install, they came out and explained everything to me and also included things in my new construction build like the "fart fan" which still cracks me up that, that's what they call it, which is an exhaust fan for the bathrooms and even thought about and recommended where I needed to put bracing and other things during my build in preparation for the ductwork that I hadn't even thought about. They also installed the exhaust duct for the dryer, which I hadn't thought about on this particular build. Tim, his wife and their staff is wonderful. I highly recommend. Thank you! read more