Turning your heat off at home while in Florida

I set the thermostat at 10C and shut off the water. We have a smart thermostat and s service that I can log onto and look at the temps minute-by minute, it also is set to send me and our house checker an email if the temp goes below set point, it also warns loss of connection (for example power failure if power is off for longer than the battery backup lasts).
I don't want to go through the hassle of winterizing the water system if I shut off the furnace, don't like pink showers when we return!