I'm planning on installing my own geo system at my home, I am an electrician by trade but my brother does HVAC and I have been involved with him on installing several systems and have gotten lots of help from you guys on different things in the past. I have some questions that may seem like simple stuff but I have only been involved with the sizing of the ground loop and calculations a couple times. Some background info, I have a 1750 sq foot brick house, it is an old farm house so it has old wood leaky windows and not much insulation in the attic. It also has a identical basement that is a separate living space. I plan on fixing these issues as money allows but i have all the equipment and materials to install a ground loop, I have thousands of feet of 3/4 poly and a fusion machine, several geo pumps, flush cart, backhoe, excavator, etc. So id like to get the loop in this year if possible just so its done and then Ill slowly build the rest of the system. I have a 1000 foot spot that I can dig a vertical trench along the treeline so its shaded my soil is pretty sandy but the ground water level is only 15-20 foot down during the dry times of the year but it is a spot that gets saturated with water heavily . I also am installing 400foot of conduit in the same trench to get underground power to my pool. Get 2 birds with 1 stone. Would it be possible to have one long vertical slinky with a valve box under the frost line so I could tie in a loop that would run a loop around the base of my 37,000gal swimming pool, during summer I could tie the loop in and use the pool to absorb the heat and in the winter I would switch the valves so the pool loop isn't tied in to the ground loop. I cant widen out until after the pool which is about 700 feet from the house. I estimate I would need 5-6 tons of cooling and 60-80k btus for heating. The soil is sandy so I was figuring 800 feet per ton. I'm concerned about the pressure being too high and could you put a manifold 700 feet from the house and run several loops at that point? I'm located in the midwest on the Illinois Iowa quad city area boarder 1.5 miles from the Mississippi River. I have a 5 ton coil in my propane furnace currently and I would like to use the compressor from the condensing unit and install a reversing valve and run the Freon through a copper coil submersed in an insulated 55gal plastic barrel that would have my ground loop water circulating through the barrel. I think doing it this way would allow me to add other heat sources later if I were to get ambitious. Please keep in mind that I'm not familiar with the calculating part of things so some of my numbers might be way off which is why I'm posting this. What do I have wrong? and How would you recommend I do this? Thanks in advance for your time and advice.