An electric fan circulates air in a room. These ceiling fans use rotating blades at the center to cool occupants effectively. These fans are often electric-powered and can be controlled to speed up the air. They are a great addition to any room. But how do you choose the right type of fan for your needs? Electric fans have blades similar to a steam or water turbine, and a DC or AC motor drives the rotor. Over the years, fan blades have become smaller and lighter thanks to advancements in electric motor design. They also use less steel and copper. There are hundreds of fans on display at the Edison…