(1) The cross-sectional dimension of a story with a height of ≤6 (18m) needs to be 280 * 280mmφ230mm；;

(2) The height below12 layer (36m) is required to be 330 * 330mmφ280mm；;

(3) The height is ≤ 18(54m), and the section size needs to be 400×400mmφ350mm；;

(4) The height below the 24th floor (72m) shall be 450 * 450mmφ400mm；;

⑤ The external dimensions of the part with a height ≤33 stories (100m) need 520 * 520 mm φ 470 mm. ..

Extended data:

Installation mode of kitchen flue:

1, single flue type

The single flue is composed of a simple rectangular smoke pipe, which goes straight to all floors of the house, and each floor of the house has an air inlet connected with the range hood. Driven by the range hood, the smoke from each floor will be discharged into the flue, and the smoke will be discharged at the outlet.

2. Primary and secondary types

The cross section of the primary and secondary flue is composed of two parallel rectangular smoke pipes, which pass through all floors. The secondary flue is provided with an air inlet connected with the range hood on each floor of the house. The secondary flue intersects with the main flue at a certain distance from the air inlet, and the bottom of the main flue has an air outlet. The flue gas is pushed into the secondary flue through the range hood, rises for a period of time through the propulsion and buoyancy of the range hood at the temperature of the flue gas, then enters the main flue and is discharged from the roof.

3. Variable pressure type

The variable pressure flue makes each layer of flue become a different cross-sectional form. After changing the cross section of the flue and using various physical laws of flue gas activity, the airflow is discharged upwards.

4. Check valve type

Non-return valve flue is to install a non-return valve connected with the range hood at the air inlet of each layer on the single-pipe flue, which can prevent the airflow from flowing backwards and make the flue gas flow in one direction.

References:

Study on the size of smoke exhaust duct in super high-rise residential kitchen-China Journal Network