Dyson has made a fan without blades.
http://www.dyson.com/fans/
It is an interesting idea. I think it has appeal to me simply for safety with children.
It pushes a thin, but strong, blast out from the edge of its ring. This, in theory, causes more air to join its flow outward. This should have something to do with high pressure always going towards low-pressure. This is the same type of thing the keeps an airplane from crashing to the ground.
There's no such thing as "suction" but instead a difference in pressure where high pressure goes toward low pressure. Read here for more.
Anyway, neat idea. . . the price is not so neat. 299.99-329.99 for a fan?!
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