Umuyoboro wa gazi yo mu kirere ni igikoresho gikoreshwa cyane mu gushyushya no kuvura imyuka yo mu kirere.Ubusanzwe igizwe nibintu bishyushya, ibikoresho byo kugenzura n'ibishishwa, nibindi, kandi birashobora gukoreshwa cyane mumatanura atandukanye yinganda, gutwika, amashanyarazi ndetse nahandi hantu hagomba gusohora gaze ya flue.Mu gushyushya gaze ya flue ku bushyuhe runaka, ibintu byangiza nkubushuhe, sulfide, na azote ya azote muri gaze ya flue birashobora gukurwaho neza kugirango umwuka weze kandi bigabanye umwanda.