Restaurants are required to oil smoke, fire will not pass, this is a similar inspection of food and beverage projects to do food and beverage projects should have

The flue pipe (flue pipe) is the exhaust gas and smoke emissions tubular devices, residential flue is used to eliminate kitchen smoke or bathroom exhaust vertical piping products, also known as the exhaust ducts, ventilation channels, residential exhaust Ducts.

When the air inlet flue gas discharged into the flue, and the lower level of the flue gas upward encounter, the two airflow encounter will form a vortex and air curtain, the vortex and air blocking the curtain will be on the lower level of the flue gas upward obstruction, once the fire check valve is stuck by the grease when the opening fails, the flue gas due to the obstruction of the upward movement, it will be to the indoor string of smoke.