You're in a room with a heater that keeps the temperature at 25 celsius. The room is perfectly insulated except for a single-window which has an area of 1.5m² and a thickness of 0.003m. The thermal conductivity of the window is 0.96W/(m * celsius). One night the outside temperature drops to -15 celsius. During this cold night, how much energy is your heater putting out in 1 hour? Assume the temperature inside remains at 25 celsius and the temperature outside remains at -15 celsius.