We have a weekend cabin in the valley and have a nice Toyo stove for heat with a woodstove. We have electricity, a well, indoor water pipes, and a refrig.
We keep the Toyo turned down to 54 degrees when we leave. Over the years, I keep having to repair broken pipes and clean up the mess from a freeze-ups that happen with power outages. We do turn off the well pump and pressure tank and drain the lines the best we can.
I want to know if there is a such thing as a ventless propane heater that does not require electricity but has maybe a battery powered thermostat that would turn it on when the cabin inside temp drops to maybe 40 degrees during a power outage, and then turns it off when electricity is back up and the Toyo comes on and warms the place up. My friend seems to think there is a such heater and it also had a few D cell batteries for a small fan. He said it connected to a 5 pound propane bottle.