The air supply duct and smoke exhaust duct cannot be different from each other, and their differences are quite significant. Now let's take a look at how to distinguish between air supply duct and smoke exhaust duct.

1. In terms of function, air supply ducts can allow indoor air circulation and reduce the content of harmful gases in the room. The smoke exhaust duct is used to prevent the production of harmful substances during the operation of equipment and facilities. The harmful substances are collected directly through the exhaust fan and sent to the purification equipment for treatment.

2. From the perspective of usage, air supply ducts are generally used in industrial, construction, and urban infrastructure construction, while smoke exhaust ducts are generally used for exhaust.

3. From a material perspective, common materials for air supply ducts include steel plates, galvanized sheets, plastic pipes, etc. The smoke exhaust duct connects the pipes as a whole and needs to be connected to purification equipment and fans.