Electric fans are devices that create airflow to cool down a space or provide ventilation. They work by using electric motors to spin blades, which push air forward. Fans come in various types, including ceiling fans, table fans, and box fans, each designed for different settings and purposes. These appliances are commonly used in homes, offices, and public places to improve comfort during hot weather. Electric fans are energy-efficient compared to air conditioning systems, making them a popular choice for many people looking to reduce energy costs while staying cool.