Quote Originally Posted by kitedemon View Post
The offset will likely be different, and if the room varies it may need to vary as well. My offsets vary greatly depending on which tub. The upper ones have a small offset (set point on the stat is 92 to deliver 90, the lowest is set to 98 to deliver 89) To hold basically consistent temps I needed multiple probes, the ambient temp is held by air return system.
I was under the impression that for the best results you should place the probe on the bottom tub. Since heat rises, and the probe is over taped over the heat tape at the lowermost position, your equilibration of temps will be more controlled. Peace.