I wasn't sure what to expect from this unit, but so far my expectations are exceeded! I got the "8kw" unit... seems pretty hot to me.I experimentally mounted this up in my workshop to test it out before installing in a camper and it really takes a bite out the cold, even in the large space. I can imagine that any smaller area would get very warm! I found it runs through about 8-10 Litres of diesel fuel in about 12-14 hrs? less if you had it on low. Very reasonable for the heat output. It does make some noise, but acceptable, and much less if it was mounted in a cabinet or something I'm sure. The cost / size / fuel / heat ratio is amazing in my opinion. lots of applications.