Indoor Car Park Ventilation Systems

Ventilation systems designed for indoor car parks are planned based on two basic needs. These systems are designed to evacuate harmful vehicle exhaust gases in daily operation and to assist people in escaping and firefighting personnel in the event of an emergency fire.

There are two different types of applications in parking lot ventilation systems.

1-Air Ducted System

Design and applications are made on the principle of achieving 10 air changes per hour for the parking lot volume through an exhaust-based duct system. In addition, since the exhaust gas is poisonous and heavier than air, suction must be made through the air duct at ground level as well as through the vents placed on the duct.

Providing fresh air to parking lots is relatively less important than exhaust. An indirect fresh air control is created by keeping the amount of exhaust air under control. Generally, fresh air is taken naturally from ramps, openings and kurangles.

In extreme cases, if there is insufficient natural clearance in the car park, fresh air is supplied to the car park with a limited number of fresh air fans.

2-Jet Fan System

Jet Fan applications are based on small-sized fans that can create high air speeds, instead of the duct system in the parking lot. Jet Fans have been used in tunnel applications for a long time. Principle; It is built on the fact that the fans create very high air speeds at their discharge ports and push and activate the large air masses in front of them. The momentum in the high-speed air mass coming out of the fan will affect the entire environment and, with the induction effect, will mobilize a much larger air mass than the air passing through the fan.

Jet Fans are placed strategically in the parking lot and transmit the above-mentioned air mass movement towards the exhaust shafts. Jet Fans undertake the task of creating air flow in the desired direction in the parking lot in a controlled manner. Compared to the ducted system, they replace the duct and equipment such as vents, diffusers and dampers on it.

The main exhaust fans in the shafts must provide the amount of exhaust (amount of ventilation) needed by the parking lot. The difference to be noted here is that, compared to a ducted system, since there will be no suction channel on the parking lot side from the shaft, the main exhaust fans in the shafts will work against a much lower resistance, almost negligible in some cases. This difference ensures that Jet Fan systems consume less energy in terms of operation and therefore are more economical to operate.