What is a whole house fan, and how does it work?
A whole house fan is a type of ventilation system that cools a house by pulling cool air from outside and pushing hot air out of the house through attic vents. It can be an effective and energy-efficient way to cool a home, especially during hot summer months.
The way a whole house fan works is relatively simple. The fan is usually installed in the ceiling of a house, such as the attic or the top floor. When the fan is turned on, it creates a negative pressure inside the house, which draws cool air in through open windows and doors. As the cool air enters the house, it replaces the hot air that is being pushed out through attic vents or other vents in the roof. The movement of air creates a draft that cools the interior of the house.
Whole house fans work best in areas with cooler temperatures at night, as they can draw in the cooler outside air to cool the home. To maximize their effectiveness, it's important to turn on the fan in the evening and turn it off in the morning, before the outside temperature rises again. It's also important to ensure that the windows and doors are open and that there is adequate ventilation in the attic to allow the hot air to escape.
In addition to being an effective way to cool a home, whole house fans can also help to improve indoor air quality by removing stale air and replacing it with fresh outdoor air. They are generally less expensive to operate than air conditioning and can help to reduce energy costs.