I have one that I bought last spring on closeout from Lowe's that is the same basic thing. Says that it is from 1000 sq feet. Bought the blower motor for it also. Blower motor is a joke. The heater seems to be doing OK although I have only used it to keep it like in the mid 50's for right now. Bought a carbon monoxide detector to be on the safe side with it so far and it appears to be OK in that department. It is claimed that it can put out a lot of humidity since it isn't vented though, but I haven't noticed it being a problem yet. I liked it because I wanted a heater that would work without electricity in a pinch though. I'm not sure yet how much I trust it since I haven't used it that much and haven't been spending a lot of time out there.