Over 80 years of continued design and manufacturing experience has been invested to produce today’s range of ultra-reliable Flettner ventilators.
The wind powered ventilators are very versatile and suitable for use in a range of applications.
The principle is deceptively simple: mounted on a spindle, the extractor fan is driven by an air scoop which catches the air stream created by the motion of a vehicle or the prevailing breeze. Beneath the spinning air scoop are vanes which expel air, drawing stale air from below. The construction of the unit prevents the entry of rain, dust and downdrafts. Extraction capacity is remarkably effective and can be regulated by adjusting the internal shutter. Wind power means a quiet, totally maintenance-free performance with no electrical connections, no battery drain, no running costs and no distracting motor noise.

Flettner still maintains the same philosophy it started 80 years ago: to provide a simple and durable exhaust air product that can be used in a wide range of applications.

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