When the door windows are closed, air is supplied to the passenger compartment by the electric fan of the heater. Air is taken in through the air intake grille installed in front of the windshield. The passenger compartment heater is installed under the air intake grille on the right side. A filter element is installed on the air intake opening of the heater, which cleans the air from dust. The heater flap - with an electric drive directs the air flow both through the heater radiator and bypassing it. The movement of the coolant through the heater radiator is not blocked (the tap is missing), and the temperature of the air entering the passenger compartment is adjusted by mixing its cold and heated flows in various proportions. The position of the heater flap is set by the electronic heating and ventilation control unit depending on the selected position of the temperature control knob. The actuator of the electric flap drive is a micromotor-reducer, combined with a flap position sensor. The electric fan of the heater has four rotation speeds (or three depending on the configuration), which is provided by an additional resistor built into the fan motor power supply circuit.
Distribution of air flows in the cabin is carried out by air distributor flaps through the air ducts of the instrument panel and the floor tunnel lining. Additionally, part of the flows can be redistributed by the guide blades of the ventilation grilles.
The exhaust is carried out due to the vacuum that occurs near some areas of the body when the car is moving. To supply air to such areas, ventilation outlets are made under the rear exterior lights, into which deflectors with valves are installed. On VAZ 2110 cars with a sedan body, the gap between the rear window and the luggage compartment shelf should not be blocked, so as not to disrupt the operation of the exhaust ventilation.
Note: On early VAZ 2110 cars, exhaust deflectors were built into the rear ends of the side doors, and a differently designed interior heater was installed.
The information is published on the website: VAZBOOK