... and floor types to Ammonia and Freon refrigeration system. BDFand LZW series with aluminum pipe and ... fins are chiefly designed forammonia system. And FD series with copper fins and ... aluminum pipe are in the purpose of freon system. Refrigerants: R717(BDF,LZW series), R22, ... 20-250m2/set, custom area is available.Pitch spacing of fins:8mm,10mm,12mmTemperature range: +5C- -30C. ...