Do these work ok or could they cause problems with the direct heat on the fv? Just remember people mentioning hotspots when you use them. At the moment I have a lightbulb in the firidge/freezer connected to an ATC-800+. I have the fridgefreezer on constantly as my hops are in the freezer part, not ideal really. The brewbelt would be better as fridge should stay cooler and less condensation. The lager seems to be fermenting fine at a balmy 10C