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    Spun Aluminum Gravity Ventilator, Size 12

    Greenheck Product # GRS-12
    Model GRS is an aluminum ventilator designed to be used as an intake or relief unit on natural gravity or negative pressure systems. The GRS has a curb cap and requires a roof curb for installation.

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    SKUBASE/PANEL LENGTH x WIDTHTHROAT AREAINTAKE AREAPRICE
    Model / Size: GRS-12
    22 x 22 in0.82 ft²2.52 ft²$190.26
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