On Tue, 10 Jul 2007 01:43:33 GMT, Alen
wrote:


Please keep in mind that the assumption is that the central air was on
all day, and downstairs is comfortable (73-75) and upstairs is
uncomfortable (83 or hight). Attic temp is 115 or higher.

What is the temperature outside? If it is hotter than the inside,
which it could be until 9 or 10PM or later, you'll just make it hotter
inside to run a whole house fan.

Plus adding all that humidity, which is uncomfortable in itself and
makes it harder to cool the air.