Installation and upkeep demands: The chiller needs to be simple to install, obtain and retain in the specified site. H? th?ng chiller m?ch n??c four Primary Secondary Stream • T?i m?ch n??c 3 và 4 thì h? th?ng s? d?ng chiller bi?n t?n ?? ch?y theo nhu c?u t?i c?a h? th?ng. T