An electric fan does not actually bring down the temperature in a room. Instead, it creates a cooling effect on your skin through increased air movement. The fan helps to accelerate the evaporation of moisture from your skin, which provides a perceived sense of cooling.
When the air moves across your skin, it speeds up the evaporation of sweat, which is your body's natural cooling mechanism. As the moisture on your skin evaporates more quickly, you feel cooler. However, the actual temperature in the room remains the same.
So, while an electric fan can make you feel more comfortable by providing a cooling sensation, it doesn't reduce the temperature in the room. It's important to note that if the room is already hot, using a fan without proper ventilation or air conditioning may not be sufficient for cooling down the space. In such cases, you may need to consider additional methods such as air conditioning or opening windows for better air circulation.