People understand that whole house fans work to keep the home cool but not many know how they actually achieve that. This lack of knowledge often leads many to not purchase these type of cooling units. Air conditioners and fans are easy to understand and so much more common that even though they may be less efficient than a whole house fan, they are bought at a more rapid pace.
In reality, whole house fans are actually supremely simple machines that work much better than the aforementioned machines.
Describing how they work is as easy as understanding the usual cooling systems. Whole house fans are an efficient and quiet way to cool a home. They grab the air from outside of the home. When turned on, the windows you pull open will be the pathway in which that air travels through the home. You have to be conscious about which windows you open, giving your home optimum air flow but you do not have to open every window. Three to four windows is ideal for these machines.
The air that flows through the selected windows goes all the way across the home and up into the attic where it is then pushed through the attic vents and into the outside air. This is why whole house fans best work when it is cooler at night. Pulling in that cool air all night can cause the home to be up to 30 degrees cooler than it was previously.
This wind tunnel also goes through the home as if it was a very large fan. It blows in quickly and effortlessly, immediately making the home much cooler than it felt before the fan was turned on. This wind tunnel is created because of the literal fan in the attic that is pulling in massive amounts of air into and out of the home.
The actual piece of equipment used is usually just a medium sized fan and a large funnel to dampen the sound and push the air into a specific direction.
These types of attic fans are supremely effective and energy efficient. They are also simply designed in order to work perfectly for any home.