Used 2020 winter in garage even though it's a car heater 600 sq. Ft non insulation works ok in the fall does great temps 50/30 winter 40/20 not so great concrete floor gets cold nothing works had wood stove took 2 hrs to get the air warm.it will get the chill out quick in fall most my jobs are only a couple hours anyway.fuel consumption was low a tank last 4.9 hrs. If it was used in camper or van would stay toasty and be cheap to operate. Housing is kind of cheap thin but remember the price cheap. The rest seemed well made and it does get hot I didn't use the remote ever thing worked as stated if used for a garage I would recommend the 8000 btu. Also didn't drain battery very fast but mine ran wide open mostly. in a vehicle it would run on low mostly and suspect would use very little fuel. mine is the fully contained with a gallon and quart fuel tank. If you have the space the other stylecan be mounted below with a larger separate fuel tank and supplies. The EXHUAST does get hot I cut hole in wall and used a metal electrical double outlet box. The knockouts are perfect size for intake and exhaust .the wall didn't get hot nor vinyl siding. Hope this helps.
debbie w. 
