Ah I see, well in the event you're stuck in colder environs a second time and provided starting a fire isn't an issue, there is an old heating method I used when I lived in the high sierras that could keep your future huts warm throughout winter it requires a stump or any log with decent girth and a metal L pipe at least 5 feet in length, hollow out a recess in the stump itself, fill it with kindling and set it alight, then affix the short end of the aforementioned L pipe directly into the stump itself then put the long end into the hut and the hot air will flow through the pipe and into your hut. It's similar to syphoning gasoline with a hose. I know you didn't ask for advice and you seem very capable but I still wanted to share what little knowledge I have. I hope you can make use of it in the future.