No hazardous refrigerant required.
Can cool liquid to 0◦C actually could freeze, if allowed.
Are able to operate at off design conditions, i.e…. higher inlet temperature with higher outer termperature.
Controls allow for steam savings for reduced cold water flow and cold condenser water.
Not susceptible to corrosive conditions , as are other types.
Total absence of moving parts and therefore very low maintenance.
Low turn-down of load.
Very Reliable