Is it safe to leave ventilation holes in large range hoods in hotel kitchens?

Large-scale range hoods in hotel kitchens do not have ventilation holes and are unsafe. According to relevant public information, the large amount of oil fume in the kitchen can easily make the kitchen environment greasy and difficult to clean. The range hood has become a powerful weapon to change the kitchen environment. Installing an exhaust fan can solve these problems. There is no need to Leave vents open, vents are not safe. It changes the general environment of the kitchen and reduces the harm caused by oil fumes to the kitchen environment and human health. The range hood can be said to be the lungs of the kitchen.