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Smoke exhaust duct and ventilation duct are pipes themselves. But from the name and function, we can see the difference. Ventilation plays the role of ventilation, to keep the indoor air unobstructed, so the ventilation pipe is the room or equipment air supply and exhaust pipe. Smoke exhaust pipe is a special pipe for smoke emission. They are usually made of galvanized sheet iron.

排煙風管要求耐高溫，對防火要求更高；建筑設計中，排煙風管的鍍鋅鐵皮的厚度是按照高壓的標準選用的，一般通風系統是按照中低壓系統選用的；如果不是空調系統的風管，一般通風管道不需要保溫，排煙風管如果是室內安裝，一般要做隔熱處理。

The smoke exhaust duct is required to be high temperature resistant and has higher requirements for fire prevention. In the architectural design, the thickness of galvanized iron sheet of smoke exhaust duct is selected according to the high pressure standard, and the general ventilation system is selected according to the medium and low pressure system. If it is not the air duct of air conditioning system, the general ventilation duct does not need to be insulated. If the smoke exhaust duct is installed indoors, it generally needs to be insulated.

排煙的目的是將室內的煙塵通過抽風機械排到室外,而通風是能過機械使室內外的空氣進行強制流通,首先他們的通風方向和地點就是不同的,其次,他們流通的空氣質量是不同的,所以不能使用同一個管道,不然,我們在通風時,不小心把煙塵通到室內,豈不是適得其反？排煙管道與排風管道的安裝標準不一樣，排煙管道系統中要安裝排煙防火閥，而普通的排風管道不用安裝。

The purpose of smoke exhaust is to exhaust the indoor smoke and dust to the outside through the ventilation machinery, and the ventilation is to make the indoor and outdoor air flow through the machinery. Firstly, their ventilation direction and location are different. Secondly, the air quality they circulate is different, so we can't use the same pipe. Otherwise, when we ventilate, we accidentally lead the smoke and dust to the indoor, isn't it counterproductive? The installation standard of exhaust pipe is different from that of exhaust pipe. The fire damper should be installed in the exhaust pipe system, but the ordinary exhaust pipe does not need to be installed.