Just thought I would pop in here and update everyone on my Geo experience! Here is the link to my original post with quotes and what not; https://www.geoexchange.org/forum/t...n-geothermal-quotes-and-what-to-go-with.7996/ I ended up going with the third quote/contractor. I can say now after over a year the Carrier Infinity series is awesome! My home is zoned so I have two units one for the first floor and one for the second. I went with his recommended wells and depth (see link) and it seems to have been perfect. We are heating our house and hot water with our Geo. Three adults and two young kids in an over 3000 sqft home. Since the day it was installed I have had the Aux heat option turned off because I was told I would probably never need it due to our loop system. He was right, our house has stayed super warm and we have never run out of hot water. Hope this helps anyone in central PA area considering Geo!