i purchased this heater to install in my little homemade camper to replace the propane heater I was using. Propane was just too wet and was causing condensation issues. This little heater is the best investment I made for winter camping. I spent a week out boondocking and the temperature dropped down to -20F outside yet in my camper it remained 72F on the lowest setting. It barely uses any Diesel fuel overnight. I left it running 24 hours a day and had to fill the tank about once every 2.5 days. It does tend to run the battery down so having an extra battery or a charger is recommended. I have solar panels so didn't have to worry so much except on the cloudy days. on those days I would just run a generator to top off the batteries before going to bed. I read the complaints about how noisy the fuel pump is and it can be quite loud. I installed mine under the bed so it muffles the sound pretty well. Sounds like a ticking clock now. Looking to buy another heater to make a portable unit for tent camping.