I am new to this site but looks like some great info here. I am building a new house down in Tennessee, 2000 sq ft rancher with basement. So I am looking at putting in a closed loop geosystem for both heat and air. First place I called carries a variety of makes, but suggested quoting WaterFurnance. So I sent them the house plans and they did a load model on the house and came back with a recommendation of a 3-ton unit (not surprising from what I have read so far). He quoted both a series 7 and series 5, 2 - 300' horizontal trenches with 4 pipes, rigid insulated duct work in the basement, air balance for all rooms, all electrical connections, all cooling water piping, and Geo-Assist water heating to my water heater. This last part seems like I have to supply the water heater. Wasn't planning on doing assisted water heating but he included it. Total quote for each unit full system installed. 7 Series = $50,505 5 Series = $46,880 Man this seems really really high compared to what I have been reading online. I could see for a existing house and increased cost for duct work installation, but something doesn't seem right. Any thoughts on these quotes would be appreciated.