| 摘要 |
A forced air vent for allowing the unidirectional outflow of exhaust air from the interior of a structure into the atmosphere by way of an eave opening includes a generally rectangular main body, arranged with a perforate bottom wall and a pair of oppositely disposed side walls and two hingedly connected movable internal baffle plates. An interior space is defined by the bottom wall and the two oppositely disposed side walls. The perforate bottom wall is arranged with a solid central portion and two oppositely-disposed distal portions. A corresponding abutment ledge is disposed between each distal portion and the central portion. Each distal portion includes a grate panel through which air can freely pass. From a closed position, the baffle plates are movable outwardly and upwardly into an opened position in response to positive air pressure from within the attic interior. The bottom wall has a convex surface protruding into the central portion to focus the air flow onto the baffle plates. The distal portions of the bottom wall each have a convex surface which protrudes outwardly away from the main body to provide a clearance space for pivoting movement of the baffle plates.
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