In our 5er we use it regularly in the spring and fall. You need to use some common sense with it though. In our case our bedroom is at the front of the trailer. The fire place is at the back of the trailer and the heat it puts out goes directly up to the A/C unit where the thermostat is located that controls the furnace. So we either have to raise the temp up so the furnace would come on to keep us warm up front or use another electric heater in the bedroom. We actually use one of the oil filled heaters in the bedroom for a more even heat.