Like the title says, temps easily drop to -20 Celcius in the daytime.. My garage is insulated somewhat but not great.
I think once an atmosphere of 20C is reached it won't be too big of a deal unless someone needs to get their car from garage.. I might even keep the heater in the tent to be more safe..
The ONLY thing I'm worried about is power outages. I plan on grabbing propane heater that can work for 6 hours but even that isn't a guaranteed win, power could go out at night and I think my res would freeze.
What do you guys suggest? Should I just forget it? Or do you think the atmospheres will be OK for a few hours on their own?