This is the air conditioning and ventilation design drawing of a commercial building. Including: home page of air conditioning and ventilation engineering design, main equipment list and legend of air conditioning and ventilation engineering, air conditioning water system diagram I, II, smoke control system diagram I, II, III, IV, equipment piping layout plan of refrigeration room, equipment foundation layout plan of refrigeration room, air conditioning air plan of B1, air conditioning level plan of B1, air conditioning and ventilation plan of 1-5 floors, Air conditioning and ventilation plan of the first to fourth floors, cooling equipment connection plan, cooling equipment foundation plan, ventilation equipment foundation plan of the fifth floor, air conditioning and ventilation plan of the roof floor, ventilation equipment foundation plan of the roof floor, ventilation plan of the roof floor of building A, Ventilation plan of building B, detailed drawing of air conditioning machine rooms on the first to fifth floors, equipment foundation drawing of air conditioning machine rooms on the first and second floors, and equipment foundation drawing of air conditioning machine rooms on the third to fifth floors.