I built this heater into a Palican case and use a power station to run it and an insulated hose up into my roof top tent. Have camped in -18 so far and leave this on all night, so warm you don't need any blankets. Need to watch youtube videos before building for the best way to build and operate as the instructions are badly written. Very happy with it and can go camping in winter with confidence. Heat pumping into the tent within a couple of minutes