The unit is supposed to require two 2-pole 40amp circuits, I believe at 240v, I have not personally seen name plate or booklet, but was assuming we could run new light/plugs and heat from sub-panel on opposite side of heater wall, and pull the old (closet)fuse panel into it and catch new later additional floor space, so I think the sub has to bump up to 150a instead of a small 12/24 125a, he originally purchased a QO 100a surface panel, and homeline 40amp breakers back in 2005 when he took out the original permit, this new sub is going to be in a bedroom wall. so I didnt want it to be massive... thanks for all your help. chris