Your firm installed an attic fan in my townhouse in May 2010. I wanted you to know that it did exactly what Buddy said it would. With the record heat this summer and my air conditioner thermostat set at 75 degrees, 2 degrees lower than last summer, my electric bill was no higher than last year. August was actually $7 less than 2009. I attribute this to the attic fan. Thanks for the great service and recommendations for my house.