RIFFELALP RESORT HOTEL 2,222 M 3920 Zerma (Switzerland) To meet the annual demand for heat required by the outdoor swimming pool by means of alternative technolo- gies, not only is the waste heat from two new small CHP units used, but also in particular the potential heat recovery from the hotel's existing ventilation and heating systems. Retro?  ing the central 550 kW oil boiler with a BOMAT Pro? therm 6G 1024 ? ue gas heat exchanger alone,

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