I have 2 outdoor thermometers; the one on the side of the house was -26, and the remote reading sensor on the telephone pole indicated -28. As unfriendly as this may seem, the wood stove had the house comfortably in the mid-70s. Overnight themostat setting was about 2.25; fans on medium speed. And no need to get up and put wood in the stove. Could this MAYBE be due to the fact that I loaded 98 lbs of oak and hard maple in the firebox? Yeah, life is good!