What is the purpose of a water softener in a boiler?

A water softener's primary purpose in a boiler system is to reduce hardness-causing minerals, primarily calcium and magnesium. Hard water can lead to the formation of scale and deposits on the boiler's heat exchange surfaces. This scaling can significantly impair the efficiency of the boiler, as it acts as an insulating layer that reduces heat transfer. Additionally, scale build-up can lead to overheating and potential damage to the boiler components, resulting in increased maintenance costs and the need for more frequent repairs.

By using a water softener, these hard minerals are exchanged for sodium or potassium ions, effectively softening the water before it enters the boiler. This process helps to prevent scaling, thereby maintaining optimal boiler performance and prolonging its operational lifespan.

The other options do not accurately describe the function of a water softener in the context of a boiler. Increasing the boiling point of water is related to pressure changes, enhancing flavor does not pertain to boiler function, and maintaining a constant temperature is more about regulating the control systems within the boiler, rather than treating the water for hardness.