VENT COVER

A vent cover is configured for attachment to a downwardly-facing surface, such as a soffit panel of a building roof overhang. The vent cover includes a housing coupled to a base portion, the housing defining a fluid discharge outlet and fluid passageway, with the outlet being selectively blocked by at least one movable door. The door is hinged at its upper end portion and is biased to a closed position by gravity. A sufficiently high air pressure will raise the door and permit an outflow of air through the discharge outlet. Where separate inner and outer doors are provided, the outer door may be manually movable to its open position while the inner door remains closed, so that the inner door continues to restrict access to an interior of the housing.