These heaters are great. I’ve got one running in my 16 x 10 x 10 shed and I just finished insulating it a couple weeks ago and I run it in there and it keeps it at 75° when it’s in the 30s. I ran it on lowest setting for a straight 24 hours and I believe I still had probably an eighth of a tank of fuel left, so I could’ve gotten maybe a couple more hours out of it. Again for the money these thing is you’re perfect. I have no problem with either of them. Great units good prices not bad at all and they do what they say. They do well within reason.