There are mixed opinions about attic ventilation fans throughout the energy repair industry. They are frowned upon in homes that have not been airsealed because they tend to draw conditioned air out of the house. Most attic fans are not properly installed anyway and that exacerbates the problem. An attic fan needs to be sized correctly to work properly. Many times thay are oversized because of the age old addage "if big is good, bigger is better". That is usually not correct and certainly not in this case.
Adequate intake area needs to be provided for any fan. We prefer solar powered fans because they use no electricity and they are easier to size properly for any home.
Call us for reduced pricing on these fans. Because we are a dealer for the manufacturer, we can save you money on the installation.