Despite all the other reviews this is a really decent heater. It's just for small spaces. I would not try to heat a whole house or even a whole room without a door. I use it in my bathroom in the winter and it is overly sufficient. Only thing I didn't like about it is that it was loud but when I close the bathroom door boom that solved the problem. I will use this heater in addition to just having a regular house furnace running in a drafty room like my bathroom I wouldn't expect this little thing to heat my whole entire house like some of the people who are writing reviews. It does the job in the winter in western Pennsylvania.