Recent Review: GeoFlow are geothermal. They are a HVAC contractor, but, they mostly do geothermal stuff, which is a little bit unusual. Geothermal is kind of new. This is the first time I've done business with this company. They haven't completed the work, just prepping. Based on what they've done so far, they get an A. They're out doing work based on a future contract which is a good sign. They are very knowledgeable and have unusual, but, great systems. I will definitely use them in the future.