I have a heat pump hot water unit in Australia - Sanden: https://www.sanden-hot-water.com.au/
CO2 refrigerant as well.
I have this one in Canada. Works well!
But having water leave the building envelope is a bit scary on very cold days. There are heat traces and freeze valves so it should be fine, but I do worry about power outages during cold snaps
I have this one in Canada. Works well!
But having water leave the building envelope is a bit scary on very cold days. There are heat traces and freeze valves so it should be fine, but I do worry about power outages during cold snaps