Anyone have an EXPERT opinion on attic fans?

If you need an attic fan and have a vent at one end of a peaked roof, you can have a fan installed there.

I did something else too. One fan in the attic blows air down into the house. Another at the other end of the house blows air into the attic. On a cool day, but with a warm attic because of sun load, I circulate air from the attic through the house. Thermostats in the attic and in the house circulate air only when the house is 70 degrees or less AND the attic is at 75 degrees or more. Also I can switch off the one that blows air into the house. On hot days, after sundown, I can blow air out of the house, sucking it in from the cooler air outside.

We had an attic fan but took it out and installed roof vents instead. They take no power are perfectly quiet & keep the attic about the same temperature as the fan did.

I live in California and I love my attic fan ! It was here when I bought the house so I can't tell how much money I save on utilities but when i come home in the evening I open the windows and turn it on and it cools my house very quickly. Then I turn on the a/c to maintain the temp

If you have gabled ends on the roof you can install them in the gabled end and don't have to worry about leaks. I'd get the type that have both thermostat and humidisat controls. Look on the WWW.grainger.com website. They also have a handy guide to sizing the fan.

I'm no EXPERT, but have had experience w/ them. If your climate is moderate in the summer, then an attic fan may be for you. If the summers get over 85ºF, I believe I'd skip the attic fan and keep using the A/C. They can be noisy when running, but once you get used to them it does offer a nice "hum" during the night to lull you to sleep (and keep you there!).

Put vents in the peaks. It's all you will need

Never had one.

Sorry