After 30 years, we wanted to replace our old gas heating system with a heat pump. Initially we had our doubts: can a heat pump also be used to heat an existing detached house without having to replace the windows and carry out extensive insulation work first? The competent advice, the communicative exchange and the thorough planning of Issler GmbH in Grenzach-Wyhlen ultimately convinced us to install a heat pump with a Solvis hot water cylinder. The clean execution of the work by Mr. Mehlin and Mr. Roser, but also by the contracted third-party companies - from setting up the construction site, to the wall breakthrough, the design adaptation to the outdoor facilities by the gardener, the installation and the insulation of the pipes - are particularly noteworthy. The deadlines were met exactly and the installation is running smoothly.
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