Whole House and Attic Fans

Fans can help cool down a home during the warmer months of the year. When looking at adding a fan to their home, homeowners are often confused about the differences between an attic fan and a whole house fan.

Whole House Fans

This type of fan is installed in the building’s ceiling. It is designed to pull hot air out of the building. Generally the hot air is forced into the attic space, causing a positive pressure in the attic, forcing air out through the roof vents. At the same time, it produces a negative pressure inside the living area, drawing cool air in through open windows.

Whole house fans can be used as a primary natural cooling device that can enhance, reduce and even eliminate the need for air conditioning. It consumes much less energy than the HVAC system and can significantly lower the temperature in the building quickly. Homeowners living in parts of the United States that experience warmer days and cooler nights could benefit from a whole house fan.

Attic Fans

An attic fan is installed at the roof level or gable end of the home. It regulates the heat level of a building’s attic by exhausting hot air. This type of fan requires additional roof vents to draw in fresh air as the hot air is exhausted.

These fans only operate during the heat of the day to reduce attic heat buildup, only ventilating the attic space. This does little to cool the actual living space. In hot, sunny, and dry climates, installing an attic fan could help supplement a whole house fan.

Before homeowners in the Treasure valley turn on their air conditioning for the summer, they might want to consider investing in a whole house fan and even an attic fan. It could make a huge difference in their cooling bills and keep everyone in the house more comfortable.


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