SpaceBus
Minister of Fire
That's the best way to check. You don't need all of your windows open, usually just cracking a door or window open an inch or two near the stove will be enough to show you if the house is too tight.I could test this on a mild day by starting the stove with one of the exterior windows open, right? I will try that. Not today, which feels like -30 with this incredible windchill.