I brumate mine in the garage also....the temps stay in the 40's. Haven't had a problem...only did it one year (only had the house for 2). It's not uncommon to lose a snake or 2 (or more depending on the number in brumation). I have had a few bad years before that. I did the fridge with the molding off the sides so air could get in....lost a bunch to high humidity. I then brumated them in my storage unit in the condo I lived in...it was under the condo (basement converted to strage units). thought that would work good, but....the heat vents for the condo above it ran thru and would heat the snakes up at night.... I lost a few there too....
