ʻO ka embossed Galvanized steel phenolic air duct sheet he hanauna hou evolution product of traditional iron sheet air duct.ʻO ka ʻaoʻao o waho o ka papa duct ea i hana ʻia me ka pā kila i hoʻopaʻa ʻia, ua uhi ʻia ka ʻaoʻao o loko me ka alumini alumini anticorrosive, a ua hui ʻia ka waena me ka phenolic foam.Ma waho aʻe o nā mea maikaʻi o nā ducts air ducts kuʻuna o ka rigidity maikaʻi a me ka ikaika kiʻekiʻe, loaʻa iā ia nā waiwai o ka mālama ʻana i ka wela o ka lapalapa ahi, hoʻoheheʻe kani a me ka hoʻohaʻahaʻa leo.Eia kekahi, ma hope o ka hoʻokumu ʻia ʻana o ka paipu, ʻaʻole pono ka mālama ʻana i ka wela lua, e lanakila ana i ka nāwaliwali o ka ʻauʻau ea laulima kuʻuna i hiki ke hoʻopōʻino ʻia ka papa mālama wela o waho, ʻoi aku ka lōʻihi o ka lawelawe ʻana, a nani a lokomaikaʻi.