| 摘要 |
A ventilating unit for a building includes an upper board, two lower boards located under the upper board and a ventilating board mounted between the upper board and the lower boards. The upper board has two opposite sides each provided with an oblique portion. Each of the lower boards has two opposite sides each provided with an oblique section and has an inner portion provided with a draining channel. The ventilating board has a surface provided with a plurality of vent holes. Thus, the hot air in the building is rapidly drained outward from the upper board through the vent holes of the ventilating board so that the ventilating unit provides a heat radiating effect to the building to lower down the temperature in the building.
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