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Reliable, compact and more environmentally responsible than ever, the new, innovative heat pump technology from Viessmann makes particularly efficient use of environmental energy for heating and cooling. With a flow temperature of up to 70 °C, the Vitocal 150-A is perfectly suited for retrofit installations. Subject to a system design meeting industry regulations and best practice, together with a weather-compensated heating system, it may be possible to retain existing radiators. High energy efficiency, convenient control via app, sustainable operation and attractive design are all convincing features.