Ngokwevelu ye-calorific ephezulu, izinto ezilahlekile endleleni yokulahlekelwa ukushisa yilezi:
1. Ukulahlekelwa ukushisa kwentuthu eyomile.
2. Ukulahlekelwa ukushisa ngenxa yokwakheka komswakama ovela ku-hydrogen kuphethiloli.
3. Ukulahlekelwa ukushisa ngenxa yomswakama kuphethiloli.
4. Ukulahlekelwa ukushisa ngenxa yomswakama emoyeni.
5. I-flue gas ukulahlekelwa ukushisa okunengqondo.
6. Ukulahlekelwa ukushisa okungaphelele.
7. Superposition kanye conduction ukushisa ukulahlekelwa.
8. Ukulahlekelwa ukushisa kwamapayipi.
Umehluko phakathi kwevelu ye-calorific ephezulu kanye nenani eliphansi le-calorific lincike ekutheni ukushisa okucashile kokuhwamuka komhwamuko wamanzi (okwakhiwa ukuphelelwa amanzi emzimbeni kanye nokushiswa kwe-hydrogen) kuyakhululwa.Okusho ukuthi, ukusebenza kahle kokushisa kwamajeneretha omusi asekelwe ezinkanyezini ezishisa kakhulu kuphansi ngandlela thize.Ngokuvamile kushiwo ukuthi izibaseli ezinenani eliphansi le-calorific ziyakhethwa, ngenxa yokuthi umhwamuko wamanzi kugesi we-flue awuminyani futhi awukhiphi ukushisa okucashile kokuhwamuka ngesikhathi sokusebenza kwangempela.Kodwa-ke, lapho kubalwa ukulahleka kwe-exhaust, umhwamuko wamanzi kugesi we-flue awubandakanyi ukushisa kwawo okucashile kokuhwamuka.