Yes, I've used it down to US zero, but the fuel requirement and the babying was a nightmare. I'd rather run a debris stove at that point. But -30 Canada is -20ish US- what did you do to preheat and prime it, I'm very curious. Becuase I love my Trangia, I'd rather run that anything else, but below zero (about -15 or so for you) I've never gotten it to work worth beans. I get a fire in the center, but it won't pressurize and burn at the jets.