Kutengera ndi kapangidwe ka mankhwala, mafiriji oziziritsa m'mafakitale atha kugawidwa m'magulu asanu: mafiriji a inorganic compound, freon, saturated hydrocarbon refrigerants, unsaturated hydrocarbon refrigerants, ndi azeotropic mix refrigerants. Malingana ndi kupanikizika kwa condensing, mafiriji ozizira amatha kugawidwa m'magulu atatu: mafiriji otentha kwambiri (otsika kwambiri), mafiriji apakati (pakatikati) ndi mafiriji otsika kwambiri (otsika kwambiri). Mafiriji omwe amagwiritsidwa ntchito kwambiri m'mafakitale ozizira ndi ammonia, freon, ndi ma hydrocarbon.