We just did our first water to water Geo! It turned out awesome!
Customer loves it, we did two sections of the house with radiant floor heat, used a variable speed air handler for the cooling of the main section, added a convector in the basement for heating and cooling.
The old part of the house is radaitors, we have a Triangle tube solo 110 doing that and an indirect hot water heater for the domestic.
A lot of stuff going on for sure.