Ducted & Shrouded Wind Turbines (DAWTs)

Like Vertical Axis Wind Turbines (VAWTs), shrouded and ducted wind turbines can be both small and large. However, they are not the mainstay of the wind industry and for that reason they are assigned a category under Small Wind Turbines on this site. Shrouded turbines are also sometimes called Diffuser-Augmented Wind Turbines (DAWTs).

There is also a collection of archival and recent photographs on the Photos section of this site. There you can find photos of Ducted Wind Turbines (DAWTs).

While ducted or shrouded wind turbines and Vertical Axis Wind Turbines can be of any size, they are listed here because they are outside the mainstream of the commercial wind industry.

Status of Vortec 7 Project


Thomas Ackermann

The New Zealand Wind Energy Association newsletter gives some information about the status of the Vortec 7 project, reports Thomas Ackermann. . .

Comments on the Vortec Diffuser Augmented Turbine


Paul Gipe

I was critical of the development of this wind turbine for several reasons: excessive hype, questionable sales of stock, and the aggressive style of the company’s promoter.

Vortec home page in June, 1997. Copyright 1997 by Vortec Energy Limited.


Attempt by Vortec to rebut their critics.

Concentrating Windsystems – Sense or Nonsense?


Heiner Doerner

Since 1996 we have a “new” old, huge, new-fangled saurian, a device erected in New Zealand. . .