It's a shame I already had show & tell because I would have really liked to discuss this with the class. Only a few days ago did James Dyson (man behind the rolling ball vacuum) reveal a new design for the standard desk fan. The standard fan is pretty clumsy although it has worked! The only problems are dirty blades, some-what dangerous if the cage falls off, & heavy immobility. They also take up some unnecessary space.
The Dyson Air Multiplier Fan has no external blades and the device draws air into the upright cylinder portion of the fan via vents on the base. The air is then funneled out through a ring that sits atop the base. The cool air is blown out of vent hidden around the ring giving the illusion that the air is being blown at the person from nowhere. According to Dyson, the fan provides a better experience than traditional fans that product uneven air circulation and collect dirt on the blades.
I think this is a great step in the right direction for improvements in technology. A safer & more efficient design was definitely needed in the world of air cooling systems.