Safe,Environmentally friendly,Intelligent,Economic 12v or 24v Diesel or Gosline For car,truck,van,boat,RV,caravan,etc. ... . Principle of operation: This heating system uses the gas or diesel as the fuel, after heating the exchanger, the hot air ... for field working E) All kinds of ship, yacht. 24V Diesel air heaters similar with webasto heating for car truck van ...