Modern heating systems ensure cozy warmth and reduce the energy costs, provided the heating installation works perfectly. Heating water plays a decisive role in this context — as it applies to all heating systems that water is the energy carrier distributing the warmth in the house. And only the right water quality adjusted to the heating system will achieve optimal energy efficiency, thus securing the investment in the long run. By contrast, untreated water can lead to expensive damage in the heating installation— this may even cause the loss of the product warranty of the heating system manufacturer. Protecting the heating installation has never been so important.