Combination heater with integrated heating elements for large vehicles The Combi 6 E is an air heater with integrated water heater. It differs from the Combi 6 by the integrated electric heating elements. For example, you can operate the heating on gas, on electricity or on both at the same time. For stationary use at the campsite, you can operate the Combi heater with the 12V power supply without using the batteries at all. With integrated heating rods: Runs in gas, electric or mixed mode Fast and even water heating in a short time Extremely low power consumption New: Up to 25 % faster heating of the interior New: More hot water for showering or washing up