12% lower hold-up volume compared with best traditional fishbone plates enables significant reduction in refrigerant charge. The C129L-EZ is a single circuit evaporator optimized for high density refrigerants such as R410A, R32, R452B and the R454B for use in high-efficiency chillers with capacities of 50-300 kW. It’s available in refrigerantoptimized versions to meet the best performance based on the refrigerant used. Corresponding model for condenser duties is the C129L-CZ.The Z-pattern channel plate technology enhances performance of heat exchangers to the limits by fully mixing the liquid and gas refrigerant through a “zigzag” flow, which increases the heat transfer coefficient. At the same time, inheriting from the dimple plate pattern of the previous generation of MPHE, C129L-EZ reduces the water side pressure drop and the amount of material used. In the reversible mode of the chiller as a condenser, C129L-EZ also delivers outstanding performance.