did a online calculator, and came back with 126 amps for sub-panel? I would like the new sub to carry gen circuits and new bath in remodeled bedroom, and possible gen load for new 12 x 22 addition later for master bedroom, exist house is 1096', watts on name plate of w/h say 26850w at 240v, the kitchen is already on a seperate sub and on new 200amp service, do I really need 111 amps for this heater or am I missing some derating? done the calculator twice?chris