exhaust fan - a fan that moves air out of an enclosure.
Air intake and exhaust vents are used in ventilating steep-slope roof assemblies to provide a means of allowing outside air to enter and exit attics and ventilation spaces.Intake Vents: Air intake vents are used to allow outside air to enter into attics and ventilation spaces. Intake vents should be located along a roof assembly's lowest eave at or near soffits or eaves.
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