Many homeowners are quite confused about the difference between whole-house fans and attic fans. While both systems can be installed in the attic and can keep the temperature down in your home, they vary in operation. Whole-house fans can remove the hot air out through the vents and draw cool air through the windows. Meanwhile, attic fans force hot air out of the attic. Thus, whole-house fans are more efficient for your home. Here's everything you need to know about how whole-house fans work and how effective they are: Amazing ventilation and a cooling system A whole-house fan is designed to work as an exhaust system that pulls hot air or the trapped heat out from a house or a building through the gables and vents by creating positive pressure. At the same time, it works as a huge fan that draws cool air to your home. This happens when the negative pressure and the fan draw the outdoor air through the window. Take note that the windows must be opened when using whole-house fan