Product Review

Mag Lev Chiller uses Low-Global-Warming-Potential Refrigerant

YORK YZ Magnetic Bearing Centrifugal Chiller is the first chiller to be optimized for use with a low-GWP hydrofluoroolefin (HFO) refrigerant.

Refrigerants are a unique problem in the green building world. Even the most energy-efficient chillers and heat pumps use them, and many of these refrigerants have global warming potential (GWP) more than a thousand times that of CO2. The “next generation” hydrofluoroolefin (HFO) refrigerants are a good solution, but if they are dropped into systems engineered for traditional refrigerants, then the equipment typically will not run as efficiently, negating much of the benefit. Johnson Control’s YORK YZ Magnetic Bearing Centrifugal Chiller is the first commercial chiller engineered specifically to use the HFO R-1233zd(E), creating a system that maximizes efficiency and helps usher in mainstream use of new low-GWP refrigerants.

Refrigerants past and future

High-GWP refrigerants can leak from refrigeration, HVAC, and other equipment during use, and this usually isn’t detected until occupants notice a change in interior temperatures—but by then it’s too late. Refrigerant charging, repairing, and disposing of equipment results in more leaks and more refrigerant in the atmosphere. The problem is severe enough that the book Drawdown listed refrigerant management as the number one action we can take to address our greenhouse gas problem.

Published January 7, 2020

Ehrlich, B. (2019, December 20). Mag Lev Chiller uses Low-Global-Warming-Potential Refrigerant. Retrieved from