Less common is an open loop controlled industrial cooler in an open tank or oil pan where it continuously circulates the temperature of the liquid. The liquid comes from the tank, passes through the pump unit, and returns to the tank. An adjustable thermostatic sensory makeup liquid temperature circulates the cooler to maintain a constant temperature of the tank.

One of the new developments in industrial water chillers is the use of air cooling rather than cooling water. In this case, the condenser does not cool with hot air refrigerant, but uses a cooling tower cooled by cooling water. This development allows for more than 15% and allows for a significant reduction in energy demand for coolers, condensers, and fans due to the small area of surface water. In addition, noise levels are significantly reduced if fans allow.