Ke piʻi nei ka noi no nā ʻāpana kaʻa i kēlā me kēia lā , ʻO nā ʻāpana i hana ʻia i nā ʻāpana kaʻa alumini, , e like me ka mīkini, kahi hub kaʻa, hiki ke hoʻemi maikaʻi ʻia i ke kaumaha. Eia kekahi, ʻo ka radiator alumini he 20-40% ʻoi aku ka māmā ma mua o nā mea ʻē aʻe, a ʻoi aku ka māmā o ke kino alumini ma mua o 40% ma mua o ke kino kila, hiki ke hoʻemi ʻia ka ʻai wahie i ka wā o ke kaʻina hana maoli..