Ishidi le-Galvanized steel phenolic air duct liwumkhiqizo wesizukulwane esisha wepayipi lomoya lensimbi yendabuko.Isendlalelo sangaphandle sebhodi lepayipi lomoya lenziwe ngepuleti lensimbi elifakwe uthayela, ungqimba lwangaphakathi lumbozwe nge-anticorrosive aluminium foil, kanti phakathi nendawo luhlanganiswe negwebu le-phenolic.Ngaphezu kwezinzuzo zamapayipi omoya weshidi lensimbi yendabuko yokuqina okuhle namandla aphezulu, ibuye ibe nezindawo zokugcinwa kokushisa kwe-flame retardant, ukumuncwa komsindo nokunciphisa umsindo.Ngaphezu kwalokho, ngemva kokwakhiwa kwepayipi, akukho ukugcinwa kokushisa kwesibili okudingekayo, okunqoba ubuthakathaka bomgudu womoya weshidi lensimbi wendabuko ukuthi ungqimba lwangaphandle lokulondoloza ukushisa lonakaliswe kalula, lunempilo ende yesevisi, futhi luhle futhi luphana.