Opanga osiyanasiyana, mitundu yosiyanasiyana, ndi mitundu yosiyanasiyana ya oziziritsa madzi m'mafakitale adzakhala ndi machitidwe osiyanasiyana ndi firiji. Kuphatikiza pa kusankhidwa kwa mphamvu zoziziritsa kuzizira ndi magawo a pampu, kuyendetsa bwino ntchito, kulephera kwachangu, ntchito yogulitsa pambuyo pa malonda, kupulumutsa mphamvu komanso kukhala wokonda zachilengedwe ndizofunika posankha chiller madzi a mafakitale.