I'd recommend you leave a warm spot in the enclosure, especially over winter. How do you plan on heating it during the day? (If you have a basking spot with a heat lamp, then at night maybe just put a very low wattage heat mat on unusually cold days) Bega can be a freezing! Bredli are fairly hardy though, but I would talk to the breeder and see what temps they have been keeping at. You may get away without night heating but it all depends on the ambient temp of the house/room the bredli is in etc... When feeding I'd leave a good hot spot for 48hrs to help digestion. Other factors to be considered would be the bredli's age.
All the best.