I assume those heaters are the equivalent to leaving an iron on, or one electric burner or similar in a small room for a long time. How big of a room is it in? Also, a lot of the reviews post temp differences over time, but never say what time they started/ended. If you start at 5 am and burn for 8 hours, the room is most likely hotter at the end of the time anyway because of day light alone. Glad to see you trying it at night.