So this site is great, thanks

Ok my next question is if I have a 12-2 wire at the baseboard then I would hook-up the dual-pole 20Amp at the box with both the white and black into each of the breakers connection and of course the ground to ground, no nuetral, right?

Steve

Yes that is correct for 240 2-wire

Yeah, mark the ends of the white with black paint or tape.

I assume the thermostat is built into the baseboard heat? Either way, even if it is a wall stat, it needs to be a double pole, be sure to read the instructions, most use two blacks for the Line, and two reds for the Load.

And ground every green screw you find, and connect the ground at the panel along with any other bare or green wires.