Two nights ago I let my stove go cold out of pure laziness. I set the thermostat to heat to 62*, put a fan in the basement blowing cold air up the stairs and set the ceiling fan upstairs on high. I will be gosh darned if the temp didn't stay at 68-66 all night long when it was 39 outside. I have a couple of computers that run 24/7, a fridge, a water heater and a washer/dryer combo in the basement and a dishwasher upstairs that run last thing before bed. All of those appliances throw off heat so maybe that's where some of it came from. Still, I was really surprised that the whole house stayed comfortable all night and into the early morning when the sunshine warmed everything up again. Maybe the previous owners insulated the house very well. Last week I kept the basement at about 80* with the upstairs at about 74* by going through 30-50# of wood. Frankly it was a little uncomfortable. Unless things change I guess I'm done running through my wood for now.