Kalk-ex AG

Kalk-ex AG from Wollerau specializes in water heater replacement and, depending on need, swaps units for heat pump water heaters, combi water heaters or electric water heaters. The work is carried out by trained specialists with backgrounds as plumbers or electricians, plus additional in-house training. The flat rate includes labor and travel time, along with a general check of the water heater's safety valve, thermostat and pressure-reducing valve, plus measures against recurring lime buildup.

The company works with a broad list of water heater manufacturers, including Atlantic, Oertli, Stiebel Eltron, Vaillant and Viessmann. It serves a large part of German-speaking Switzerland with canton-specific pages for Schwyz, Zurich, Aargau, Bern, Lucerne and others.