topten.ch Wärmepumpen-Ratgeber
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topten.ch was founded by the association Topten act sustainable and is co-funded by EnergieSchweiz and several cantons. The platform lists only devices available on the Swiss market, and ranks them by measured seasonal performance factor rather than manufacturer figures.
The heat pump guide explains the differences between air-to-water, brine-to-water and groundwater heat pumps, gives pointers on natural refrigerants such as R290 and R744, and lists what to watch for when talking to an installer. Heat pump water heaters for hot water are covered in a separate list.