I have recently bought one of these things due to my car's own heater fan failing during the cold weather. Well what can i say, to those who have given this item a good review, you either have shares in the company that makes these, sell them your self of have an incredibly low tolerance to heat because seriously, rubbing your hands together will generate more heat, ratings wise i don't know how hot 1 BTU is but my guess is this won't even be 1, not even the heat of a candle, so for a heater for your car, camper etc etc, please don't bother, they are a waste of money