-4 last night here in the tundra zone. I have a 125,000BTU heater in the g'house, with another as backup in case of failure. And yes, it HAS happened. I do have a very good furnace guy that comes right away when I call. He says "you can call anytime......even during the night. You're one of my good customers". I said "oh, you mean because I PAY promptly??" Yep!
I pre-payed $2800.00 of LP in August.