iityhubhu eziphothiweyo ngamaza omoya aphezulu zisetyenziswa ngokubanzi kushishino lwepetrochemical kwaye ubukhulu becala zifakwe kumacandelo okuhambisa izifudumezi ezicinyiweyo, izibiyeli zobushushu ezitshisiweyo, iibhoyila zobushushu benkunkuma, i-economizers, izifudumezi zomoya, kunye nezifudumezi zobushushu ezibandakanya ukuhanjiswa kobushushu ukusuka kulwelo olushushu ukuya kulwelo olubandayo ngolwelo. ityhubhu eludongeni.