The flue size below 18 floors: 430mm×300mm, the flue size below 24 floors: 460mm×400mm, the flue size below 30 floors: 600mm×400mm.

The hole in the chimney that sends flames and smoke to the outside space. Flue is a pipe product used to remove smoke generated by cooking activities in the kitchen or dirty gas in the bathroom. Also called exhaust duct, ventilation duct, residential exhaust duct. The residential flue is the main component of the exhaust pipe system used in residential kitchens and bathrooms.

Extended information

A flue pipe is a tubular device for emitting exhaust gas and smoke. A residential flue refers to a vertical pipe product used to remove kitchen smoke or bathroom exhaust gas. , also known as exhaust duct, ventilation duct, and residential exhaust duct.

Principle of flue operation: When the air inlet flue gas is discharged into the flue, it will meet the flue gas discharged upward from the lower layer. When the two air flows meet, they will form a vortex and air curtain. This vortex and air resistance will The stagnation curtain will hinder the upward flow of smoke from the lower layer. Once the fire check valve is stuck by oil and fails to open, the smoke will flow into the room due to obstacles in the upward flow.

Reference: Baidu Encyclopedia - Flue