barnartist said:Flyingcow, I need to learn about this probe controller you have. I am realizing that a standard thermostat will probably not be the ideal way to control the room temp.
Also, how are you heating the rest of the house outside your radiant area?
I'm in the process of installing Tekmar 541 thermostats. You can optionally add a slab sensor to them. I've got a one slab sensor that is in concrete and a couple that are under the subfloor in between the staple up plates, and insulated with foamboard. I think Honeywell makes a similar thermostat and slab sensor set up.