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    Spun Aluminum Gravity Ventilator with Flashing Flange, Size 12

    Greenheck Product # GRSF-12
    Model GRSF 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 flashing flange for roof attachment.

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    SKU BASE/PANEL LENGTH x WIDTH THROAT AREA INTAKE AREA PRICE
    Model / Size: GRSF-12
    22 x 22 in 0.82 ft² 2.52 ft² $184.56