[karostay]

I have same situation..Live up north [Maine] in the summer head south for winter.
My home has base board heating..Furnace is mechanical and can fail that's my biggest fear. due to the fact it's mechanical failure or winter storm cutting of the power.
I had my local heating company come out and fill my heating system with an antifreeze that's designed for heating systems.
Then they drain all my water lines , shut off incoming water, fill all sink traps and toilets with biodegradable non toxic antifreeze.
I can leave with with a good feeling my home is safe from winter
Then before I return they open my home turn everything back on.