Hello Anonymous, in Switzerland the general agency (Qubiq Airtech AG) is responsible for warranty services. If the device is registered at https://warranty-woods.com/ and the anti-mould filter (see link below) is changed once a year (keep receipts), Qubiq Airtech AG guarantees a 6-year warranty.
Our appliance is approx. 3 years old and runs perfectly. We are not aware of the current warranty for a new appliance. As the appliance is not used very often, we have not replaced the filters as specified. We like the large water tank of 10 litres.