Well, outside temp -7.9C at 5am, inside temp at 10.7C. Banked the stove last night at 7pm and put my trust in the Walapini theory. It looks as if it is doing what it should. We will see sunlight for the next few days after almost 6 weeks of continuous rain. That will lighten up on the electricity bill, as well as helping rebuild the energy in the backwall. Going to get down to-15 to -20C the next few nights so will be interesting to see the real effects. I know the wood pile is going to take a beating! Stay warm everyone.