Ductless Car Park Ventilation System
GTG Airtech Pte Ltd offers a system, now widely being utilised in Europe and North America and South Korea, for above ground and basement car park ventilation.
Over the years, conventional ducted ventilation system has established its standards and functionalities. Firstly, it has to effectively remove or dilute toxic gases from emission of vehicles and make sure that there are no pockets of stagnant air. Secondly, in the event of a fire, it has to clear heat and smoke generated by fire as soon as possible for fire-fighting to be carried out after that. Other criteria that are desirable, though harder to be attained, are to create a smoke-free clear path for Fire Service personnel to enter for fighting the fire as well as protection for the public to escape.
To achieve better result, conventional ducted system always demands a larger space for ducting installation but this is difficult under constraint of a normally limited space in car park.
Advantages of Ductless Jet Fan System
The Jet Fan System has many advantages over the old ducted method of car park ventilation, but the most important are:-
Owners
Lower Operating cost
Low electric energy consumption from the jet fans
Lower electric energy requirement from the main supply / exhaust fans due to lower static pressure loss
Possibility of zone / timer control in response to the demand of the system, e.g. Peak lunch hours
Easy maintenance
Servicing / Replacement of the jet fans is easy and can be carried out during normal running without switching off the whole system
No more worries about damaged ductwork at low level due to usage
​
Space Saving Installation
Reduced ductworks and the overall area can be better utilised for other services
Better comfort
Average velocity in the car park is higher as compared to conventional ducted system
Authorities
Reactive System
System is being designed to react to the actual environment conditions within the carpark
Better control of the smoke flow in the event of fire
During CFD analysis, the dead zones and hot spots are being identified and addressed
Design for the protection means of escape
Increased safety and efficiency for the fire service in the event of fire
​
Eliminating weak links such as ducting
Reduced ductworks installed and thus able to install more systems
Computational Fluid Dynamics (CFD)
For both ventilation and smoke control CFD is extensively utilised to ensure full coverage of the Car Park area, eliminating local pockets of CO build-up and predicting Smoke path in event of fire.
Main Supply MV or Natural Opening that complies to code
Main Exhaust MV that complies to code
Ductless Jetfans to transfer the air from Supply MV or opening to the Exhaust MV
Main Fresh Air MV Fan / Opening to bring in tfresh air into the system
Main Exhaust MV Fan to remove the required exhaust air out of the system
CO Sensors located around the carpark for Energy Savings operation
