Blowing hot air out of a fan does not inherently help cool down your room faster. In fact, it can make the room feel warmer if the air being blown out by the fan is hotter than the ambient air in the room.
Fans work by moving air around, creating a wind-chill effect that helps evaporate moisture from your skin, making you feel cooler. However, if the fan is blowing hot air into the room, it won't help with cooling.
The concept of fans blowing air outward is typically seen in exhaust fans or ventilation systems. These fans are designed to remove stale or hot air from a specific area, such as a kitchen, bathroom, or attic. By expelling the hot air outside, they create negative pressure inside the room, which draws in cooler air from other parts of the house or through open windows and doors. This process can help improve overall ventilation and remove unwanted odors or excess heat from specific spaces.
Fans that blow hot air out were not invented for cooling purposes but for ventilation and air circulation. In various industrial settings, these fans are used to expel hot air or fumes generated during manufacturing processes or to maintain a controlled environment. In residential settings, exhaust fans are commonly used in bathrooms and kitchens to eliminate steam, cooking smells, and excess heat.
For cooling down a room, it's best to use a fan to circulate the air and create the wind-chill effect. Additionally, using an air conditioner or opening windows to allow cooler outside air in can be more effective for reducing room temperature.