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    Considering a redesign of my ventilation

    I accept: The one's from airboosterfans.com have 240 free air cfms.In Carbon Filter -> 435 CFM 6" Fan -> Out of Tent -> Up into attic AND 6" duct fan (165 cfm) -> 400w HPS cooltube -> Out of tent -> attic. Typically the temperature at the canopy 12" below the light is approx. 7 degrees higher...
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