Traditional hot and chilled closed loop systems are generally considered easier to treat than open systems, because in most cases the same water circulates with little to no fresh water added. For these systems, a treatment program may only require quarterly scheduled service.

Open tank chilled systems, on the other hand, like those found in plants utilizing injection molding equipment, are different in that the water in the tank is being continually turned over and saturated with oxygen. The makeup requirements are also higher due to the need for mold changes to accommodate different parts.  These systems are dynamic and can be very challenging. 

Knowing how to identify and predict problems before they start, as well as providing the solution is the basis of what Heat Power Engineering provides to each customer.