Its been below freezing for about a week. Anyone know at what outside temp that would prevent casting. Logically there should be point that heat loss is too near heat gained by heater to keep alloy up to temp. Also since it is bottom pour there is probably some temp where the spout will not remain open to pour. There is a lot of tough experience on this site and if anyone should know this would be the place. The reason for question is I do not want to go to trouble of moving everything outside if it is too close to temperature limit to insure ability to case.