I can relate to this problem. Years ago I lived in a small house 24 x 24 with the living room ceiling open, about 16 - 18 ft high with a loft bedroom. I used my large allison wood stove for heat and the lower area was not that warm but when you went upstairs you could not stand it cause it was so hot. I used a box fan upstairs to blow down into the living room which helped a little but not much.