I bought one of these heaters to use downstairs in my computer room. That room has no heat at all in it. I spend a lot of time on my computer and in the winter I just about freeze to death down there. I did research here on Amazon and read many reviews before deciding on this one. I really liked the idea that it was thermostat controlled. I put the heater next to my computer desk on the floor and set it to #1 and then turned up the other knob until the heat started running. This heater put out a lot of heat, even on the 1 setting, and my feet began to feel hot. So I got a small step stool I had and put it on that to see if the heat would cover the rest of my body better. This was a big improvement because then my whole body was warm. In fact, it warmed me so well that I had to push the heater further away from me and not point it directly on me because it did get a little too warm after awhile. My computer room is a rather large room, at least 16X24, so the room does not get toasty warm with this heater. But it does take off the chill of the room and makes it comfortable.I have never had to use the #2 setting on this heater and from what I understand from reading here, the lower the number that you use, the less electricity that you use.I liked this heater so well I decided to buy another one for a large bathroom that we have--the bathroom is as big as a very small bedroom. I take showers and this bathroom is the only one that has a shower stall in it, but during the winter it feels so cold in there after you get out of the shower. So I ordered another one. Evidently the second heater I ordered did not come from the same seller and later I found out it was a refurbished heater. That would explain why this 2nd heater did not run well. Not only did it not push out the heat, it made a terrible noise. I told my husband that something was wrong with the heater and had him to compare the 2 heaters side by side and even he could tell the difference in how much the heaters put out. I call Amazon and told them the problem. I sent it back to Amazon, free shipping back, and re-ordered another one of these heaters. It was when I decided to send the 2nd heater back that I discovered it was a refurbished heater--and the price for the refurbished heater was a higher price than the band new heat I bought the first time. There was only about 3 months difference between the times I ordered the first and the second heater so there should not have been that much of a rise in price.The 3rd heater I ordered came and ran just as well as the first one did--and was a cheaper price than the refurbished non working heater I bought the second time. So make sure when you order one of these heaters that you are not ordering a used/refurbished heater or you might run into the same problem I had.Would I order another one of these heaters again? You bet, because for the money they put out a lot of heat and work very well.