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通风道包括厨房的排放烟气、厕所排除气味以及需要进行排放室内气体的房间所采用的通风管道。通风道按制作安装方法分为现制成孔通风道和预制拼装通风道两
Ventilation ducts include exhaust fumes from the kitchen, toilets to remove odors, and ventilation ducts used in rooms where exhaust gas is required to be vented. According to the production and installation of ventilation channels are divided into holes made of ventilation and prefabricated ventilation duct two