Solar attic fans are better than conventional fans because they lower core attic temperature by 50 to 60 degrees Fahrenheit using renewable solar power, which help to reduce air conditioning costs up to 30 percent. Conventional fans lower temperatures using electricity, which adds to energy costs and carbon emissions.
Solar attic fans also prevent mold and fungal growth that cause roofing materials to rot, thereby extending their life. There is no installation cost, as the fans are fully assembled requiring no electricians, circuit breakers and power cables, and can be self-installed in one hour. The operating cost is zero and a 30 percent tax credit is offered by the government as an incentive for energy conservation, as of 2015.