Icwecwe elifakwe esinyithini somoya wephenolic yimveliso yesizukulwana esitsha sombhobho womoya wentsimbi yemveli.Umaleko wangaphandle webhodi ye-air duct yenziwe nge-galvanized embossed steel plate, umaleko wangaphakathi ugqunywe nge-anticorrosive aluminium foil, kwaye umbindi uhlanganiswe ne-phenolic foam.Ukongeza kwiingenelo zemibhobho yomoya yentsimbi yemveli yokuqina okuhle kunye namandla aphezulu, nayo ineepropathi zokugcinwa kobushushu belangatye, ukufunxa isandi kunye nokunciphisa ingxolo.Ngaphezu koko, emva kokuba umbhobho wenziwe, akukho ukugcinwa ubushushu yesibini efunekayo, nto leyo eyoyisayo ubuthathaka zemveli sheet intsimbi emoyeni umbhobho ukuba umaleko wangaphandle yokugcina ubushushu yonakaliswe lula, inobomi benkonzo elide, kwaye intle kwaye nesisa.