... ,LZW FD Series,ceiling and floor types to Ammonia and Freon refrigeration system. BDFand LZW series with aluminum pipe and fins ... copper fins and aluminum pipe are in the purpose of freon system. Refrigerants: R717(BDF,LZW series), R22,R404a,R507C(FD ... of fins:8mm,10mm,12mmTemperature range: +5C- -30C. FDL(S) Freon Dual Discharge Room Air Cooler