Izifudumezi zamapayipi zilungele ukufudumala ukugeleza komoya onomfutho ophansi ngokufudumeza kwe-convection.Ezindaweni ezibandayo nezinomswakama, izinga lokushisa eligeleza komoya lomgudu lizokwehla kancane kancane odongeni lwepayipi.Kulesi simo, i-heater duct yomoya ingaba usizo ukunikeza ukushisa okudingekayo ukuze kufudumale isakhiwo.Idizayini elula ye-heater yamapayipi isici esiyinhloko salo mkhiqizo.