I'm trying to replace my old wall thermostat for radiant heat in the ceiling. My old thermostat has a place for three wires red black and white. (load lead and common) All the thermostats that I find are for electric baseboard heat and have only red and black. Do I need a special one or will this type work?

Need to know the make and model number of your three wire stat.

My old thermostat is a Federal Pacific TW1 single line break 22A 120-240 or 277 v.a.c. The black wire is on the line screw the red is the load and the white is the common