Isn't it bad that the external machine of Sanheng system is on every day?

Not easy to break. The service life of pipelines in Sanheng system is 50 years, and the service life of main mechanical equipment is 15 to 20 years. The capillary used in Sanheng system today is PP-R (scientific name: random copolymer polypropylene), which is widely used in construction, municipal engineering, water conservancy engineering, agriculture and industry. Three constant systems, namely constant temperature, constant humidity and constant oxygen systems, come from Shi Lang, Jinmao and other science and technology museums. The real three-invariant system is not a simple treatment of temperature and humidity and PM2.5, but a control of it in the best range suitable for human body, so that comfort can be naturally formed.