Has anyone seen a source for a water source mini split heat pump?. It sort of makes sense that a water source unit would make sense for both winter heating and summer cooling. Obviously I could cut up an air source unit and replace the coils with a heat exchanger but that would obviously ruin any warranty. I dont have much experience with AC but when I worked in a industrial plant, all the AC units were water cooled as the atmosphere was damp and dirty. I have an old well that would make a nice winter and summer source with two pipes already running from my well to the basement. The well is 17 feet deep and was built with a couple of truck loads of crushed rock at the base for addtional storage. I have soft water so I dont really have to worry about scale buildup but worst case is I could put a coil in the well and have an intermediate loop. With the exception of making sure I dont overcool or overheat the well am I missing anything on why these units arent available except in 3 ton or larger sizes?