Water circulation is supported by a separate electric water pump. The water temperature is infinitely variable and the system can be operated in screen defrosting mode or in leg-room heating mode or in an intermediate position. Warm air circulation in driver's and co-driver's leg room, also for demisting alongside upper part of dashboard. The air throughput of the heating system can be boosted by a 2-speed fan. Noiseless and electricity free convector heating is used as passenger compartment heating.
Installation is alongside the left and right side walls and guarantees an even inside temperature.
The air duct ventilation system includes individual adjustable nozzles as well as slots towards the side windows and the isle. Constant fresh air supply is achieved by double fan units installed in the air-conditioning unit of the roof, which also serve as forced draft ventilation in case of an electrical fault. The air conditioning system is installed on the roof of the coach. The compressor is driven by the coach engine. The compact, easy serviceable unit has very short supply lines for the R134a gas.