Compliance Standards and Common Problems in Ventilation Duct Equipment Many bosses generally ignore the smoke exhaust system and natural ventilation planning of the restaurant kitchen when they open a new restaurant, which eventually leads to the closure of the hotel for renovation, renovation or sale of serious losses. All kitchens have flues, and the flues are also divided into main and auxiliary. The main flue surrounds all the doors, while the auxiliary flue is relatively independent. Generally, the oil fume in the home will go to the auxiliary flue first, and then enter the main flue according to the hole on the baffle, so as to ensure that the oil fume of each household is blocked. There is a supplementary air outlet at the bottom of the main flue. The basic principle is to send the smoke into the secondary flue according to the range hood, and use the driving force of the range hood and the buoyancy of the water on the temperature of the smoke to raise the smoke for a certain distance, and then enter the main flue to discharge to flatten the roof. In addition, the ventilation duct decorative board is added, and the flue opening can be changed into the decoration ceiling. If it is a Chinese-style hood, there is generally no decorative board outside the flue hose. The flue hose is docked through the trim panel or from the cooker hood in the cooker hood wall cabinet. Generally speaking, when a new restaurant is opened, there are many salesmen from environmental protection and kitchenware companies to discuss the business process. During this period, many salesmen and even the company itself do not have professional skills in these areas. The engineering project does not meet the required requirements. The planning and equipment of the kitchen fume exhaust pipe in the restaurant are unscientific, which will generally lead to the unsmooth exhaust of the kitchen fume and immediately endanger the application of the fume and fume purifier. Therefore, we usually plan the fume for the restaurant kitchen equipment. When the machine is installed, it is necessary to pay attention to the matters of the fume ventilation duct equipment.