| 摘要 |
A roof vent for ventilating the roof of a building to the atmosphere. The roof vent includes a flange portion to lay against the roof, the flange portion having an opening to let air vent from the interior of the building (e.g. an attic). The roof vent can optionally include a collar portion extending from the flange portion and enclosing, at least in part, about a periphery of the opening and a cap dimensioned and configured to cover over the opening (including the hole in the roof) and optionally over the collar portion. The cap is configured to provide a passage (between the flange portion and the cap) through which air can pass between the atmosphere and the opening. The roof vent also includes a corrugated filter plate, e.g. partially enclosed by the cap, and interposed between the central opening and the passage, the corrugated filter plate having a pore size sufficient to permit air to pass through but inhibit the passage of snow particles, cinder particles and/or water droplets there-through. |
