Jet fans or inductionfans support the natural flow between the supply air and extract air zones.Since jet fans are only installed at particular points, they take up less than0.5 of the ceiling area. Ventilairs Jet Fan is specially designed to achievehigh impulse throw of discharging air. It consists of an attenuator at thesuction and discharge site, pre-designed inlet and outlet guide vanes. The fanunits are of high efficiency. Ventilairs Jet Fans with volume flow rate up to1200 CMH and a throw distance of 35m attenuator at the suction and dischargesite, well spun inlet and outlet venturi for laminar flow of air pre-designedinlet and outlet guide vane. Jet Fans add momentum to both air and smoke flowin a vehicle tunnel.