Leave it to the air maestros at Dyson to create a fan with no blades. The Dyson Air Multiplier ($300-$330) uses a fairly ingenious design to suck air into the base, accelerating it through an small aperture in the device's ring and then over a ramp to channel its direction. As it happens, this also causes the air behind and around the machine to be drawn into the airflow, creating a smooth stream of air amplified 15 times, without the unpleasant buffeting caused by the blades of a traditional fan chopping the air. The only downside? It's a $300 fan.