1. The interior heating and ventilation system includes a four-speed electric fan, deflectors in the center and at both ends of the front panel, as well as air ducts to the feet of the driver, front and rear passengers.
2. The control panel is located on the front panel. It controls the rotary dampers that regulate the air flow through and beyond the heater. The dampers are located in the mixing chamber, where cold and hot air flows are mixed and sent through air ducts to various areas of the cabin.
3. Cool air enters the system through a grill at the rear of the engine compartment and passes through a cabin filter that traps dust and debris.
4. Next, the fan drives the air into the mixing chamber and further into the air ducts. If the air requires heating, the dampers direct it to the heater core, which is heated by the engine coolant. Exhaust air exits the passenger compartment through grilles at the rear.
5. If necessary, the access of outside air to the cabin can be stopped, then the air in the cabin begins to be recirculated. This mode of operation of the system is sometimes useful, because it allows you to warm up the interior faster and get rid of unpleasant odors from the outside of the car. However, it is not recommended to use this mode for a long time, since the air in the cabin ceases to be updated and quickly deteriorates.
6. Some models are equipped with electrically heated front seats. The seats are heated by special electrically conductive mats sewn into the cushions and seat backs. The temperature is maintained automatically and can be set at three levels, which are set by a switch on the system control panel.