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In my case there are three 14" square roof vents, with a whole house fan on the center one. So it can suck up on the center one and blow down on the two ends. It may not be as efficient but it works with what's there.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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