For those without the luxury of central air conditioning, summer can often be a season of roaring wind machines that plague your attempts at peaceful sleep. But theres hope on the horizon: Dyson has revamped its fan tech and toned down the decibels with its Cool series of bladeless fans. Easily mistaken for chihuahua accelerators, these fans are the successors to Dysons 2009 Air Multiplier line, which offered a breakthrough design at perhaps a too-precious price.