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There are many types of electric fans, including portable or personal-sized fans, industrial-strength high-powered fans, and electric box fans. Oscillating electric fans circulate air by revolving fan blades as they spin. Some fans are dual powered, meaning they can run on batteries as well as electrical power.
An industrial-strength, high-velocity fan is a good choice for those who wish to cool a large area or room. Some of these are free standing and feature wheels on casters. This enables the fan to be moved about.
The high-velocity fan may be constructed of coated metal, including the fan blades. This type of fan typically features multiple speeds. The interior motor is encased inside the metal housing. Many people use these fans in garages, offices, and warehouses, but they are also suitable for very large rooms. The powerful motors of these fans will circulate air more efficiently than a standard fan.
Oscillating electric fans may have a floor stand or be made to sit on a table top. These types of fans allow air circulation from all directions, as the head of the fan oscillates. The fan head will generally be adjustable for various angling. The floor-standing models may have various height adjustments.
Window fans are shaped to fit snugly into the frames of most windows. The window fan will pull in the fresh outside air and circulate it into the room. These generally work best during moderately cool outdoor temperatures, because using a window fan during an extremely hot day will only circulate warm air. Some window fans utilize twin fan heads in one unit.
Space heaters combine a heating element with an electric fan to help circulate warm air throughout the room. Some may oscillate and most have various temperature control settings. A fan speed control switch may also be included in some models.
Tower, or pedestal-style, fans are made to save space. These feature a tall and thin design, and most feature an oscillating mode. Many also have an optional remote control, allowing the user to operate the unit from across the room. The slim structure of the fan makes it a good choice for busy areas.
Box fans are generally less expensive than other styles of fans. They are square, similar to the appearance of a box. Some of these electric fans are constructed of metal, while others have plastic blades. There are two- and three-speed models of box fans.