In Hydroponics, lights, pumps and air extractors can warm the reservoir water temperatures. The water temperature is very important in Hydroponics cultivation, as it leads to plant root and health problems.
For ideal plant health, the optimum temperature of nutrient solution is between about 15°C to 23°C. A water chiller is a device used to facilitate heat exchanged from water to a refrigerant in a Hydroponic System.