What are the differences between smoke exhaust ducts and ventilation ducts?

1. Different functions

Ventilation ducts are piping equipment that can promote air circulation and reduce the content of harmful gases. The exhaust duct collects harmful objects from the exhaust fan or suction port and sends them to the purification equipment through the duct. After reaching the standards, they are discharged or reused.

2. Different uses

Ventilation ducts can be used in industry, construction projects and urban infrastructure. The exhaust duct is mainly used for exhaust.

3. Different materials

Ventilation ducts are divided into steel plate air ducts, galvanized plate air ducts, plastic ventilation ducts, etc. The exhaust duct only requires a purification device and a fan. Generally, the duct is connected as a whole and then forms a partial exhaust system.

2. What are the precautions for installing smoke exhaust ducts

1. The specifications, installation area, and elevation of the smoke exhaust duct must meet the design requirements. The on-site air duct installation must not be lower than the effective cross-section of the interface.

2. The air duct interface connection must be in a tight and solid state, and the thickness of the gasket must not be less than 3 mm and cannot protrude into the pipe or outside the flange. It is recommended that the air duct flange gasket be made of non-combustible materials, and the thin steel plate flange air duct should be connected with bolts.

3. The installation of air duct hangers and brackets must be carried out in accordance with the relevant provisions of the national quality acceptance specifications.

4. The air duct connection port must be inserted in the direction of the air flow and sealed.

5. The connection between the air duct and the fan should be flange connection or soft short pipe connection using non-combustible materials. For example, when used for smoke prevention and smoke exhaust, it is not recommended to use flexible connections.