On Wed, Jul 24, 2013 at 6:23 AM, Rick Bolen(gm) <rickbolgm@gmail.com> wrote:
What fan are you using?

I use this:

http://airscapefans.com/products/Shop/Natural-Cooling/Whole-House-Fans/AirScape-3.5e-WHF

Without any controllers or anything.  It is certainly more expensive, but it has a very nice insulated damper system, the ducted fan cuts down on noise, and the super large fan is much quieter than multiple smaller fans.  It was however, a bit of a bitch to hoist and hang the fan from the rafters