EL507 | 500mm (W) | 700mm (H) | BTU at 60℃: 1045 | 242 WattsEL512 | 500mm (W) | 1200mm (H) | BTU at 60℃: 1925 | 446 WattsEL612 | 600mm (W) | 1200mm (H) | BTU at 60℃: 2226 | 515 Watts