Petra to Introduce Next-Generation Air-cooled Chillers and Packaged Units

Petra recently introduced its next-generation units: APSze air-cooled chillers and air - cooled packaged units using very low global warming potential (GWP) refrigerants. Petra’s variable speed drive (VSD) screw chillers use hydrofluorocarbon (HFC) refrigerant R1234ze, and Petra’s VSD scroll packaged units use R542B.