Next week we are putting the heat exchanger for my new HVAC geo-thermal system into the lake. Rather than loops of tubing, we are using stainless steel plate radiator (https://awebgeo.com/). It's going in about 13.5' feet of water. Generally they claim you need about a 1/4 acre pond with 10' of depth to support one of these, so it should have zero impact in a 50 acre lake, especially with the amount of flow through water exchange we have.


Ross Canant