The hospital clean operating room has the higher requirement on indoor cleanliness、tempreture and moisture

the four-pipe-water system has been increasingly applied in the operating room construction because of its high load adaptability、good accommodative facility and can be better satisfied the clean operating room's control requirement.The cold and heat source is the key factor of the four-pipe-water system.The article combines the engineering constuction examples

supplies four types of the cold and heat sources

and hopes to give some references to the designers.