It gets cold here too.
I found a gas burning heater called a 'West Wind', think it was built by Stewart Warner. 6 volt thing wth a spark plug.
Haven't got it to fire yet, haven't figured out where to put it either. Don't need any self immolation by fire happening here.
(Hey, be nice now)
I, being older and liking a little comfort, have been thinking about how to keep my toes from falling off, wooley socks don't cut it.