If you never lived where it snows and were moving North to where it does snow, what would you have liked to have known? What would you do to prepare?
18°C is recommended, especially for uninsulated pipes and where the ambient heat may have trouble reaching, as these spots may get colder.
More importantly, check your home insurance coverage policy, some will set a minimum temperature to maintain to be covered, with some exemptions in case of a power outage and other things outside of your control.
I’d go somewhere in-between to keep things dry.
Condensation around windows and outer walls make great growing grounds for mold. 15°C is the recommendation here.
Shit can happen. Boilers break. Leave your faucets dripping and run your circulation pump off of a battery and inverter to save your pipes.
