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On Tue, 14 Dec 2004 15:09:49 -0600, (m Ransley)
wrote:

You will not know if the venting was needed unless you do calculations
on what you need . Even then overventing is better. I hope you do not
run the power vent in winter or much in summer. They do pull up and out
conditioned air.


this is usually the case when the fan is over sized for the attic
inlet air flow. But a very good point that should be known by anyone
that is thinking about installing an attic powered vent system.

later,

tom @
www.FreelancingProjects.com