Fan AP

Electric fans have a motor that moves blades that are attached to a central rotating hub. Other common power sources for fans include internal-combustion engines and steam or gas turbines. Fans circulate air to cool and ventilate rooms and to control humidity.Electric fans are used to regulate interior temperatures. People commonly use them during hot and humid summer days to increase air movement throughout a home. Some electric fans are movable and can be put on a desk or on the floor. Larger models are permanently installed on the ceiling.