| 摘要 |
An apparatus and method for handling and controlling exhaust from a ventilation fan. A header is placed over the exterior end of the exhaust air conduit used to exhaust air by the ventilation fan. The header provides upper and lower air paths for the exhaust, but blocks direct wind from entering the air conduit. The upper and lower air paths terminate in exhaust openings. The exhaust openings are similar is size to one another and are similar in cross-sectional area to the air paths through the header.
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