Wolf 6000AW combi heater is the analog of Truma D6E, which has been adopted for North American market. This unit produces plenty of heat to bring comfort to vehicle of any size. Being very popular in Europe, this unit is now available with 240V and 120V rated water heating elements for RV hookups in US and Canada. It is equipped with 10L stainless water tank and is capable of heating both air and water at the same time using gas, and/or electric power. This unit works best when hooked up to electric power on a campsite. Air is heated by fuel only, water may be heated by fuel, electricity or combination of both.