Foerderrechner FWS
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The FWS subsidy calculator pulls together the funding programs of every canton and shows an approximate cantonal contribution depending on your location and the type of heat pump chosen (air-to-water, brine-to-water, water-to-water). You enter your postcode, plus details on building size and the existing heating system.
The result is an approximation and should be checked against the cantonal energy office before you file the actual application. FWS updates the figures regularly, since cantons can adjust their subsidy rates every year. For homeowners still in the planning stage, the tool makes a solid starting point.