Why calculate the Langelier Saturation Index?
Water is naturally a universal solvent. If it is under-saturated (LSI < 0), it will aggressively dissolve metals from your pipes and heat exchangers to reach equilibrium, causing catastrophic leaks and infrastructure failure.
Conversely, if water is over-saturated (LSI > 0), it will precipitate calcium carbonate (CaCO₃) scale onto heat transfer surfaces. Just 1mm of scale can increase boiler energy consumption by over 7.5%, drastically increasing commercial operating costs.