I bought this heater a couple of months ago for a screened in deck after a lot of back and forth in looking at different technologies. I have tested it so far on a 40 degree evening and on about half power I felt comfortable sitting a few feet away from it. The heater currently is on a slight angle but if I find the time I probably just need to loosen a few screws and realign it. The second time I used it, it would not stay lit. Customer Service quickly provided a fix and it worked. I was not thrilled to have to invest 45 minutes of my time to fix it, but at this price point one can only ask for so much. Overall, I am happy with the purchase so far.