And yet, I can run my oven for hours while baking something, and it doesn't set off the CO detectors. In an emergency situation, you do what you have to do.

I live in Northern New England. Temps here can easily hit -25F with wind chills of -50F or more. I have personally used an outhouse toilet at -14F. It's very unlikely that I will ever actually need to run my oven to stay alive, but I'm not afraid to bake for two hours at 500F, which heats up the house quite a bit.