Okay after some detailed Googling I didn't quite get my question answered. I have a "few" cans of freon that are on a shelf in my garage and have been there for quite some time. I am thinking about moving them to the shed which is unheated and usually sustains higher temps in the summer than the garage. I know freon in a car A/C system is subjected to temp extremes; but would it be fine to store sealed, unopened cans of freon in a shed that would experience temps from -20°F to 100°F?