Viessmann launches new residential air-to-water heat pumps

The Germany manufacturer said its new heat pump systems use propane (R290) as the refrigerant and are able to provide a maximum flow temperature of 70 C. Their coefficient of performance ranges from 4. 7 to 5. 1. Germany-based heating specialist Viessmann has presented two new air-to-water heat pump series for residential applications. "The new heat pump families Vitocal 250 and Vitocal 150 make it easy for system operators to choose the right device," the manufacturer said in a statement. "They can choose between the Vitocal 250 series, which offers the best efficiency, highest comfort, and very ...

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