Tower fans oscillate like most ordinary fans, but with a wider area of air circulation coverage and distribution (due to the length of the vent running the full height of the fan). Tower fans oscillate on a base stand and distribute air circulation at a 90-degree angle. This angle, combined with the height of the unit, gives the tower fan its wider area of cool air circulation. A timer is included in the control panel on most models, which can be set to operate for up to several hours before shutting itself down (power off). Ionizers have become the standard in modern tower fans. An ionizer button is located on the control panel for activating air purification. A removable air filter helps prevent the spread of pollen and dust. A support base assembly is mated with the motor base to keep the tower fan standing vertically. Tower fans come with remote controllers for easier operation. The biggest distinctive feature about tower fans is the slim design that allows the device to be positioned in spaces that are too narrow for an ordinary fan.
A cylindrical container houses the tower fan's impeller. The impeller blades move air through the cylindrical column and then out of the vents of the tower fan. Unlike an ordinary fan's propeller blades (which move air in a horizontal direction), the tower fan's impeller blades move air up and down the column. The cylindrical column has openings and closings that allow or block air from escaping the cylindrical container. The impeller is nearly as tall as the fan unit (up to 30 inches on some models).
The air blower houses the air impeller that moves air through a vertical shaft. An inlet for the air is located in the side of the tower fan casing. The air intake travels to the air guide. From the air guide, the air stream moves out the exit vent. Air is distributed from the air blower assembly to the surrounding environment. The air current moves in a vertical wave out from the tower fan, distributing cool air to the room at floor level.
Tower fans are more prone to overheating (some models) due to the vertical design of the casing. Air moves up through the fan casing, passing through a very compact space. Heat travels in the same direction (upward), and the tower fan has more components for the heat to travel through. To reduce overheating, a polarized plug with one wider blade (a plug that can only be inserted into a polarized outlet) is designed for quality tower fans to prevent overheating. Tower fans are never sprayed with water or placed near windows. The tower fan is placed in a dry, clean place for the best performance and safety.