The smoke exhaust pipe for a 600-square barbecue buffet is 300*800, and the diameter of the branch pipe should be changed according to the actual length of your pipe. Model of variable diameter fan: 4-72No4A, motor speed 1450rpm, power: 1. 1kw. Appropriate distance from the lower exhaust pipe to the exhaust fan = 3.5A, air volume 4240m3/h, total pressure 50 1Pa, rotating speed 960r/min, power 1. 1kw, diameter of main exhaust pipe 260mm, diameter of each branch pipe 120mm, and wind speed in the pipe.

The lower smoke exhaust barbecue table is equipped with a pipe with a diameter of 60 mm. 8 stoves, 5.5KW range hood, B4-72 centrifugal fan, 2.8A model. The pipe diameter should not be less than 400 mm It depends on the actual situation of the shopping mall. How thick is the small supervisor coming out of the table? 120mm。