I'm sure this is out there, but a quick search didn't give me what I wanted. Anyone know the actual draw on the stat when the furnace is running? I'm going to experiment with something different than the basic mechanical stat. And I'm assuming I'll need a relay to make it all happen. But the unit I'm going to play with first does have a simple pass through and may be able to handle the 12v, if the draw is not too high. Thanks in advance.