The ventilation and heating system of the vehicle interior is a forced-air and exhaust system, while the temperature of the liquid heated above 90°C from the engine cooling system is used for interior heating.
When the door windows are closed, air is supplied to the passenger compartment by an electric fan. Air intake is carried out through the air intake grilles installed under the windshield frame. To clean the air entering the passenger compartment, a filter element made of non-woven synthetic material is installed on the casing of the heater electric fan. To adjust the intensity of air supply by the electric fan, there are three modes of its operation.
The hood is carried out due to the rarefaction that occurs near some areas of the body when the car is moving. Exhaust vents are built into the rear ends of the side doors.
The interior is heated by a heater located under the instrument panel. When the lower lever of the ventilation and heating system control unit is moved to the red sector, the heater valve opens and its central damper moves. The heated liquid from the engine cooling system begins to circulate through the heater core, heating the air passing through it.
When the lower lever of the ventilation and heating system control unit is moved to the blue sector, the heater radiator valve blocks the flow of fluid through the heater radiator, and the central damper, closing, directs the fluid flow around the radiator. If the lever is located at the intersection of the red and blue sectors, then part of the air flow passes through the heater core, and part - along the bypass.
The two upper levers of the ventilation and heating control unit distribute the air flow throughout the vehicle interior. The left lever controls the distribution of air flow to the feet of the driver and passengers and to the central ventilation grilles of the instrument panel. The right lever regulates the intensity of blowing the windshield and front door windows. Additionally, part of the flows can be redistributed by the guide vanes of the ventilation grilles.