Whilst windows are usually areas where the coldest temperature comes into a room it does not make sense to locate a Suka heater there if you have curtains which then block the heat from being radiated into the room. Our trained consultants will advise the best positioning for your chosen heater for each room. Remember, cold air sinks to the floor and will eventually be sucked into the ribbed front and back of the Suka heater to get warmed up. The thermostat feeler/sensor is located at floor level and measures the air temperature there, so the heater automatically will adjust to the situation. Just the same if in winter the sun shines into the room, the thermostat shuts the Suka heater off until more heat is required. Compare this to night storage heaters, which are not able to be switched off and you can only open the windows to let the excess heat out or close the curtains to keep the sun out!