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    Gravity Ventilators

    Gravity intake and relief ventilators for use in non-powered applications.
    The gravity intake and relief ventilators are non-powered (do not have a fan) and work on pressure differential between the inside and outside of the building.
    Aluminum ventilators, with curb cap, designed to be used as an intake or relief unit on natural gravity or negative pressure systems. The GRS requires a roof curb for installation.
    Aluminum ventilators, with flashing flange, designed to be used as an intake or relief unit on natural gravity or negative pressure systems.

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