Iipilisi zokufudumeza zenziwe ngoluhlu lweetyhubhu zobhedu kunye ne-aluminium okanye i-copper fins ukunyusa indawo yokudlulisa ukushisa.Ulwelo lokufudumeza lujikeleziswa kwityhubhu ngelixa umoya oshushu udlula kwityhubhu kunye namaphiko.Iikhoyili zokufudumeza zamanzi ashushu okanye umphunga ogcinwe kwifreyimu yentsimbi.I-steam inikezelwa kwaye ikhutshwe ngeentloko kunye nokudibanisa okwandisiweyo ngecala lokufikelela kwiyunithi yokuphatha umoya.