I have no doubts that relatively poor insulation (especially in our attic) is the culprit for us. I set our heat pump to come on at 65 downstairs and 69 upstairs, and usually around 2am they'll start cycling. The other issue is simply the layout of our home: it's not the most conducive to wood heating by any means...smaller, cut up rooms with lots of doors and bends to navigate, etc. If we ever buy/build again, we'll keep a much more open layout in mind along with better insulation. Also, if I ever have the CTCs, I am trying me one of those NC30s!