generally, the kitchen fume exhaust volume is calculated according to the projected area of the burner and hood. According to the burner, it is generally 2511~3111m? /h One burner calculation; According to the projected area of the hood, it is calculated according to the projected surface wind speed of 1.5 ~ 1.8m/s. The calculated larger exhaust air volume is the design exhaust air volume. Calculate the cross-section size of the pipeline by using the designed exhaust air volume, and know and choose the fan.

smoke control and exhaust duct: normally it is closed, and when a fire occurs, it will be automatically opened by the alarm signal.

Fireproof air duct: normally open at ordinary times, and automatically closed when the air duct is higher than 71 degrees.

Extended information:

Smoke control and exhaust system: it is composed of air supply and exhaust pipes, tube wells, fire dampers, door switch equipment, air supply and exhaust fans and other equipment. What is the setting form of smoke prevention system? Stair positive pressure

there is a direct relationship between the smoke exhaust quantity of mechanical smoke exhaust and answer system and the smoke prevention zone. Smoke prevention facilities in high-rise buildings should be divided into smoke prevention facilities with mechanical pressurized air supply and natural smoke exhaust facilities that can open external windows.