Due to the lack of window parameters relating to the glass for heating, the indicators for the heating function are set to ON. Heat increases in 40 sec. The interval is 45 kcal (188 kJ). Daily heat gain: 180 kcal /1hx 24h = 4320 kcal/day, 752 kJ/1h x 24h = 18058 kJ/day.
The above at 57 W/h.
The above calculation refers to the roof window
High temperature heaters charge up to 200 W/h.