nice collection... Those thermostats list the wattage amounts they can handle on them I suggest finding out the amount of watts your uth's hold or get flex watt ten times cheaper easy to use and install. Also if your uth's are different sizes you can't plug them into the same thermostat because they will heat differently, and thats not safe. Also if you get flex watt use the same type, as in watts and size, or you will have to same problems as the heat tape