Isitovu segesi sisitovu esibaswa yirhasi etshayo efana ne-syngas, igesi yendalo, ipropane, ibutane, i-liquefied petroleum gas okanye enye igesi enokutsha.Ngaphambi kokufika kwegesi, izitofu zokupheka zazixhomekeke kumafutha aqinileyo njengamalahle okanye iinkuni.Le teknoloji entsha yokupheka yayinenzuzo yokulungelelanisa ngokulula kwaye inokucima xa ingasetyenziswa.Izitofu zegesi zaba yinto eqhelekileyo xa i-oven idityaniswe kwisiseko kwaye ubungakanani buncitshiswe ukuba bulungele ngakumbi kunye nefenitshala yekhitshi.