The FN series products are air cooled heat exchangers for refrigeration system. They are divided in 4 groups: FN, FNC, FNS and FNV.   The air flow of them all is flowing out by side except FNV, which is top blowing. All the products have been tested _disibledevent= "urn: schemas-microsoft-com: office: smarttags" /> 134a, R404A, R407C systems.