Johnson Controls unveils water-to-water screw heat pump

US-based Johnson Controls says its new screw heat pump is able to deliver high-temperature hot water as high as 80 C. The system reportedly has a combined coefficient of performance of 4.1.US-based industrial conglomerate Johnson Controls has introduced a water-to-water screw heat pump intended for use in small commercial buildings and district heating. The company said its new York YVWH Water-to-Water Dual Variable Speed Screw Heat Pump is the first of its kind using the R-1234ze refrigerant in North America. "R-1234ze is a refrigerant with an ultra-low global warming potential (GWP) of 1, enabling ...

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