More and more cantons are regulating heating system replacements according to the MuKEn guidelines. As a result, monovalent systems, especially heat pumps, are increasing significantly. This is shown by a recent data analysis commissioned by the Conference of Cantonal Energy Directors. The revised Lucerne Energy Act has been in force since January 1, 2019. It regulates heating system replacements according to the current model regulations of the cantons in the energy sector…