I can say that it is one of the best purchases for camping trips. The device works very well – it ran continuously on level 2, from 8:00 PM to 8:00 AM, and consumed less than 2 liters of diesel. I insulated the pump, and now I can confirm that it no longer emits disturbing noise. Additionally, I extended the thermostat to 7 meters and purchased a 40 cm flexible tube that extends up to 6 meters.