Izifudumezi zamashubhu zinamandla okwakhiwa zibe cishe noma yikuphi ukuma noma ukucushwa okudingekayo ukuze kuhambisane nohlelo lokushisisa.Ngenxa yokuthi aphakathi kwama-heater kagesi ahlukahlukene athandwa kakhulu.Ukudluliswa kokushisa okukhethekile nge-convection, conduction kanye ne-radiation kuziboleka zilungele ukusetshenziswa okuhlukahlukene okuhlanganisa uketshezi lokushisisa, amagesi, umoya kanye nenhlobonhlobo yezindawo.