I usually set my central heating to 21 degrees at night and now with realtime monitoring off the power usage, i can see the following at night:

That is from midnight till 6AM. I think the reason why this is happening is that the temperature sensor is in the lounge and it drops temperature there much quicker than the rooms so the central heating keeps revving up to get the temperature right. Can the Daiken central heating system have multiple temperature sensors or am i better off using a zwave device to measure temperature in the room and let openhab drive the daikan via skyfi?