I had -33 this morning, when I looked. My dogs are not a fan, they are pampered inside dogs, so about 2 minutes outside, and they are trying to lift all of their legs at the same time. I did learn I need to add a little more blow in insulation. Amazing how 24 inches of blow in insulation sinks to about 12 inches, in a year. I also learned that 30% of propane in my 500 gallon tank doesnt give enough pressure when it is -33 to keep the furnace, and oven going at the same time.