The UTH is just to create a hot spot. When measuring temps, the warm side should be 88-92. And cool side should be around 80 and no less than 75 minimum. (Below 75 and your snake risks upper respiratory infection.)
This allows the snake to thermoregulate itself so both sides don't need to be warmed up.
I have my rooms at 70-75. My tub hot sides are at 91. The cool side is perfect at 80 naturally, so no need for anything extra.
And you would still need a thermostat for the one UTH you are getting.
If you can't properly warm up the tubs, you may have to buy a space heater and heat the room a little extra.
If you're going to buy a thermometer, get a digital one. The stick on dial ones are worthless. The petstore kind is decent. If you want a more accurate reader, get an infrared temp gun from Amazon or a hardware store. Those are really the best.
Thank you for doing your research and setting up your enclosure before getting your new snake! Not many people prepare these days anymore.
Sent from my DROID RAZR using Tapatalk 2