A water chiller is a device used to lower the temperature of water. Most chillers use refrigerant in a closed loop system to facilitate heat exchange from water where the refrigerant is then pumped to a location where the waste heat is transferred to the atmosphere.
Application – It is used in hospitals, airports, manufacturing plants, industrial workshops, shopping malls and even residential buildings.
A water cooler, is a machine that dispenses and often also cools or heats up water with a refrigeration unit.
Application – It is used in workers accommodation, labour camp, Hotels and Restaurants
A heat pump is a device that can heat a building (or part of a building) by transferring thermal energy from the outside using a refrigeration cycle.