When the door windows are closed, air is supplied to the passenger compartment by the heater electric fan. Air intake is carried out through the air intake grille installed in front of the windshield. The interior heater is installed under the air intake grille on the right side. A filter element is installed on the air intake of the heater, which cleans the air from dust. Heater damper - electrically operated directs air flow both through the heater core and bypassing it. The movement of coolant through the heater core is not blocked (faucet missing), and adjusting the temperature of the air entering the passenger compartment is achieved by mixing its cold and heated flows in various proportions. The position of the heater damper is set by the electronic control unit for heating and ventilation, depending on the selected position of the temperature regulator knob. The actuating mechanism of the damper electric drive is a micromotor-reducer, combined with a damper position sensor. The electric heater fan has four rotation speeds (or three, depending on the configuration), which are provided by an additional resistor built into the power supply circuit of the fan motor.
The distribution of air flows throughout the cabin is carried out by air distributor dampers through the air ducts of the instrument panel and the floor tunnel lining. Additionally, part of the flows can be redistributed by the guide vanes of the ventilation grilles.
The hood is carried out due to the rarefaction that occurs near some areas of the body when the car is moving. To supply air to such areas under the rear exterior lamps, ventilation outlets are made, in 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 vents were built into the rear ends of the side doors, and a cabin heater of a different design was installed.