I bought one of these last winter, when I lived in Montana. Both my husband & I smoke, but do not smoke inside our home. We bought this heater to use in our  2 car unheated garage, so we had a place to smoke. Well if you know anything about Montana winters, it gets quite cold! This heater did a wonderful job at keeping our garage warm. I would recommend this heater to anyone! I would also buy a new one, if I ever am in need! It does take some time to heat the room, when you first turn it on. But once it's warm, it stays that way!