Bought this unit two years ago now. It is installed in a 12ft box van and fuel line in connected directly to the van's diesel tank. I run it off of one 12v house battery that charges every time I drive.It has been great year round and pumps out a lot of heat. I've run it on high for a quick heat up, and on low for 8-10 hours overnight while camping in below freezing temps. I only used one heat vent.I don't normally stay in the same place for more than 1 or 2 nights before driving to a new spot, which charges my battery. I'm not confident I would get three nights on it without either running my van to charge my battery or hooking up a solar charger. But for how I use it, it has worked great.I bought it with the dial thermostat for simplicity, I didn't want a lcd or remote etc.
David storer 
