Originally Posted by Sunroofcuda
We have well water & this time of year it is COLD. A 40^ increase is not going to cut it for us unfortunately. The size unit we have right now is going to cost 1k, without installation. One of my BIL's is a plumber, so installation is not a worry.


the one I linked at 1700 bucks will do a 100 degree delta at 4gpm so it would be plenty for a modern shower, maybe 2.
but as I metioned it is expensive compared to a standard heater.