When we built our house in 1995 we went with an open loop system, if I remember correctly it ran off our well at under 3.0 GPM. A few years ago we converted to a closed loop system, in my situation I prefer the closed loop. We would flush our open loop system every 2-3 years, this isn’t necessary with our closed loop. There really shouldn’t ever be a need to maintain the coils underground so I don’t think it matters from that standpoint if they are under water or dirt. I did most of the dirt work myself, I was impressed with the directional boring guys. They set up 75’ east of my house, went under the footing and came up in a 16” hole in the concrete floor next to the heat pump. I took them less than 30 minutes. Running the heat pump hard today with the air conditioning as it’s about 90F outside, I like my house around 67F. Good luck.
Bryan
