| 摘要 |
A ventilator for straddling an aperture in a roof of a building, the ventilator comprising at least one rectangular cover panel having an interior surface and an exterior surface. A plurality of longitudinally spaced interior walls are provided for supporting the panel over the aperture, with each wall having a portion extending beyond the edge of the panel. A longitudinally extending baffle wall is spaced outwardly from the panel edge and is supported in an upward direction by the lateral portions of the interior walls. A plurality of openings are provided in the baffle wall for draining water from the ventilator, and an upstanding baffle is spaced inwardly of and in line with each opening to deflect any wind-driven rain or snow entering through the opening from entering into the roof aperture.
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