Flettner2000 Rotating Wind Driven Van Air Roof Vent in Black Flettner Ventilator Limited is the world leader in wind-powered ventilators. Known for their amazing reliability Flettner vents are used around the globe on virtually every kind of vehicle not to mention dozens of other application from motor caravans to mountain cabins. Engineered for sheer durabilty and toughness, the ventilators can cope with extreme conditions from equatorial downpours to Antarctic ice.

Good ventilation is vital..

Owners and operators of commercial vehicles have a duty of care to their employees and a legal responsibility for the saftey of the public.

Indicative Extraction Rates The following table shows indicative extraction rates for the Flettner 2000 ventilator. It should be stressed that air extraction rates vary according to the positioning of the ventilator and the configuration of the vehicle or building to which the ventilator is fitted. . . .

Wind Speed.

Air Extraction Rate. . .

MPH.

KM/h. cu ft / min. cu m / min. . . 10 20 30 40 50 60 70. 16 32 48 64 80 96 112. 8 19 30 41 52 63 75. 0.23 0.54 0.84 1.16 1.48 1.79 2.13. . . .