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.
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.
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.