Last winter was the first one in the new log house. The best I could do heating the main floor from the basement was about 65 degrees because I had 10' x 66' of uninsulated 12" block basement wall. I put high density 2" foam(R12) board on the outside of the walls earlier this month. Here it is going up: We fired up the H1 (aka the Beast) for the first time yesterday since this big cold front was inbound. The house was cold at 63 degrees since I was trying to hold out until 1 Nov to fire the wood. First thing I noticed is that within 4 hrs the main floor came up to 66 degrees, something I have never seen happen from a cold start. Usually the temp would only crawl up over a 12 hr period. When I went to bed last night it was 37 outside, & 71.9 inside. I never broke 70 last winter....I was smiling ear to ear. This morning(7ish) it was 26 outside, and ....whaaaat?.....yessssss........71.2 inside! The Beast was at 380 with a giant bed of red hot coals so I opened up the aux air & threw some kindling on top to burn down those coals. Holeey crap, even the wife said....I think you have got it figured out!