So this was a fun weekend. We've been building a small 600ish sq foot cabin. all open with a small loft. Ive had my 94 jotul series 8ap burning a few times now. Well last night after completing more insulation and drywall, I woke to the smell of smoke. Went out and saw good puffs of it coming our the top damper vents. Flue temps were still in the 4-500 range, so I know it was drafting good. (this is all new pipe, so I knew there was no clog). due to the smell i opened a window to help clear it out. after that I didnt see it happen again. Im going to assume this is due to negative pressure? This is all off grid, no power or running water so options for moving air is limited (working on solar next year, just a generator now and a compost toilet) I have no problems just cracking a window for exchange, but when it gets to -30, that wont be so much fun. Any ideas? We have a ceiling fan that runs at night to help circulate the heat, but without positive pressure, that doesnt really matter.