I don't have a regulator or anything on my UTH. It's not attached to the tank (they're both sitting on the floor right now since I haven't gotten the rest of my set up moved over), but the UTH can get up to 118. I've used it for the near two years I've owned the snake without any issues. No burns or anything. On the other hand, it's a 5 gal size UTH on on end of a 30 gal long (even when she was in the 10 gal I didn't have problems). I do need to get the one end of the tank propped up slightly for air flow, though.