Air-conditioning water system: According to the location of the area, service area and room function, each water system has a loop on each floor, each loop is the same level program, and the riser is the same vertical program. The air-conditioning water system has two controls, which are used in winter and summer, closed mechanical circulation, constant pressure in the landing expansion tank, and automatic adjustment of the water level. Hot and cold water system replenishment uses a modular sodium ion exchanger for softening. The hot and cold water and cooling water circulation system is provided with a circulating water processor, which has anti-scaling, anti-rust and anti-algae functions. The hot and cold water supply and return water pipes shall have a slope of not less than 3 ,. An automatic exhaust valve shall be provided at the highest point of the system, and a drain plug shall be installed at the lowest point; the condensate water pipe shall be set at a slope of not less than 8 ,, and the fan coil condensate branch pipe Set a slope of not less than 10 , toward the condensate main. Ventilation system design, the underground car garage is equipped with a mechanical exhaust system, and the air intake adopts a natural fill of the lane. The amount of exhaust air was calculated according to the number of times of 6 h ventilation, with 13 in the upper part and 23 in the lower part. The exhaust outlet is located on the 2-story roof to prevent exhaust gas from adversely affecting the building and surrounding buildings. The exhaust system of the garage also doubles as a smoke exhaust system. In the event of a fire, the lower exhaust vent is closed and the upper exhaust vent is opened for smoke. Lock Washer,Starlock Washer,Spring Lock Washer,Washer Lock wenzhou dayang fastener co.,LTD , https://www.dayangfastener.com