Glycol / water fluid mixtures generally contain inhibitors that protect the inside of the piping system from corrosion caused by electrolysis. As well small dirt or rust particles may be kept in suspension longer until captured by the in-line filter which will reduce maintenance issues. The effective cooling range may be adjusted slightly lower by reducing the loop temperature if required in some systems. All chillers and heat pumps that are exposed to outdoor temperature below the freezing point (32 Deg. F. or 0 Deg. C.) all require treatment with glycol additives.
