Higher System Performance Unlike conventional ducted systems, where there is no control over supply air, Jet Thrust Fans allow control over supply air to create an even distribution of fresh air.   By controlling the air supply, a full smoke control design can be made – something just not possible with a conventional ducted extract system.   In an emergency situation, full fan extract rate can be reached in as little as 20 seconds allowing immediate response to the situation. Full smoke control can be designed into the system, and with a fully reversible extract system if required (see Jet Thrust Fans).	Dual Tower Buildings - Bahrain
	Lower Installation Costs Installation costs are normally lower with a Jet Thrust System, compared to a ducted system.   Main extract fans are significantly smaller than for ducted systems and can achieve same air-change rate performance with smaller fans. Installation is simpler saving on labour costs, dependant on the size and form of the car park.   There are other hidden savings too. With no ductwork, other services such as, cables, gas and water supplies, soil pipes and so on, can be routed straight across the ceiling line, without having to divert around extract ductwork or hangers.
Lower Running Costs Long-term running costs are significantly lower, even on a constant run system, and even more impressive if the project uses CO/LPG sensing, to selectively run the fans.   Far lower system resistance, compared to a ducted system means that less powerful extract fans are used to maintain the same volume flow rate - meaning lower power operating costs and less noise pollution. Access for routine maintenance is easy, and of course, there are no ducts and dampers to be cleaned and inspected.	World Trade Centre - Bahrain
	Optimises Car Parking Space Optimum use of car park space with no requirement for low-level extract points frees up car parking space. The low profile design fans can be used to optimize headroom for vehicles and pedestrians and gives a more pleasing aesthetic appearance.
System Design Unlike most other systems available on the market today, Fläkt Woods designs and models car park systems using highly sophisticated and state-of-the-art CFD analysis programs. This enables the car park to be optimally ventilated, ensuring maximum efficiency in pollution and emergency extract control.	Ice Dome - Düsseldorf Germany