So, after many, many hours of research, I decided on this unit. The instructions are better thank the chinglish others have and it’s pretty straightforward. I installed this in our 40’ 5th wheel as we are full time living in it. The wife does not like to be cold and this unit I planned as a supplement. Easy install with a few upgrades to exhaust vent, fuel line and clamps. Keeping it at the lowest setting maintains a 66 degree temp int the entire 5th wheel. It uses just under 1/2 gal a day of diesel for 24 hours of non stop use (temps outside were 27-56 degrees). Love the dry heat and if diesel prices come down, my end up being my primary source of heat. Currently, it uses just over 1 gal for the highest heat setting. Hope this helps if your in the fence.