Whole house fans are GREAT!! (For about 2-3 weeks of the year) For our geographic area. It's way to humid and hot during most of the summer, and way too cold obvisouly in the winter. During this 45-48 week time period, they do nothing more than allow energy loss in a home.
The before/after pics that follow show you what Comfenergy can do to allow you to keep your whole house fan for when it makes sense....but not loose energy the rest of the year!