In fact, under legal conditions, you can design the hood flue and fan according to the amount of oil fume generated by the restaurant! It is best to find a professional company to make a simple design quotation! You can find more! Then choose the best! If I remember correctly that a muzzle in Yantai has an air volume of 2111, I don't know your details (the number of muzzle, the length of air duct, whether to add silencing and degreasing equipment), and I can't calculate the approximate air volume and suction. With these data, I can roughly estimate the cost!