What are the methods of setting tube wells in air conditioning room?

1) location and practice: pipelines of public facilities such as air pipes and water pipes can be set in the tube well. The tube well should be located in the center of each area of the building, close to the machine room. Tube wells should be bottom-up and should not turn halfway. Especially when the high-rise building is a tube structure, the core area of its inner tube can often be used as a tube well. There are two kinds of tube wells. One kind has maintenance space, and the minimum maintenance space is 50~60cm, which is the passage space for workers. Manholes should be reserved on the passage, and the manholes are generally 1.2m? 0.6 meters. The size of this tube well should not be less than 2 times the cross section of the air duct. However, attention should be paid to the pipes in the tube well entering and leaving each floor, especially the air duct needs to open large holes in the wall, which must be coordinated with the structure, and the tube well should be placed where the holes in the wall do not damage the structural rigidity. Especially in the earthquake area, it is best to set the tube well outside the core area of the structure. The other is to stick hollow bricks or steel wire mesh without considering maintenance, and tear down the wall when it meets maintenance. 2) Size of air duct away from the wall: the clearance from the concrete wall when one or both sides of the air duct are against the wall, and the small air duct (? 300mm？ 300mm) is suitable for150mm, and is suitable for large pipelines (> 300mm? 300 mm) should be 300 mm. 3) Considering fire safety, the tube well should be isolated with concrete every three layers.