What are the installation steps of kitchen smoke exhaust pipe?

Installation method of smoke exhaust and ventilation pipeline in kitchen:

1, single flue type: it is a rectangular flue pipe that goes straight to each floor, leaving an air inlet connected to the range hood indoors.

2. Variable pressure type: During installation, each layer of flue is designed with different sections, and then the flue gas flows to the upper exhaust.

3. Non-return valve type: A connecting non-return valve is arranged at the upper air inlet of the single-tube flue, which can prevent air flow from flowing backwards.

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