The FN series Productsare air cooled heat exchangers for refrigeration system. They aredivided in 4 groups: FN, FNC, FNS and FNV.  The airflow of them all is flowing out by side except FNV, which is topblowing. All the products have been tested on 2.8MPa air leakage, and thesystem is disposed of pollution, applicable to R22ã????????R134aã????????R404Aã????????R407Csystems.