Screw heat pump

The York YVWH Water-to-Water Dual Variable Speed Screw Heat Pump is the first screw heat pump in North America to use R-1234ze refrigerant, the company says. R-1234ze is a refrigerant with an ultra-low global warming potential (GWP) of 1, enabling the YVWH to go considerably beyond the refrigerant regulations that go into effect starting Jan. 1, 2025. The YVWH supports simultaneous heating and cooling functions and can be operated in three modes: heating only, cooling only or simultaneous heating and cooling. Especially advantageous for high-temperature hot water heating applications, the YWVH can provide water temperatures up to 176° F (80° C). At that temperature, the unit can provide 4,050 MBH of heating while simultaneously providing 200 tons of chilled water cooling at 41° F (5° C). The YVWH also features variable-speed drive and has excellent turndown that allows it to run with as low as 25% of the design-heating load.