Dyson's fan works by drawing air into the base at up to 27 litres per second, using a turbine. This air is then channeled through a small slit in the circular ring on top at up to 55mph. The air is blown forward through the ring and out towards your face, while the air surrounding the ring is drawn into the airflow as well. Dyson claims that 15 times as much air ends up in the air flow as actually passes through the turbine itself, making it super efficient.



Link: TechRadar