An air-conditioning plant has a housing (2) with channels for the climatised warm (4) and cold (5) air. There are several outlet channels (17 to 19) on their downstream side. There is a sliding flap for both the warm and cold air channels to give the required mixing ratio. There is a rotary flap(15) which is selectively connected to one of the outlet channels. On the upstream side of the cold air channel is the cooler and downstream of this, but on the warm air channel, is the heater. The housing is located near the centre of the dashboard in the cabin of the car.
