ʻO ke kānana ea kūpono waena ua hana ʻia me nā olonā hana a me ka hao galvanized. Nui nā pono like ʻole e koho ai, me 40-45%, 60-65%, 80-85%, 90-95%. Hana ʻia ka flange me ka hao galvanized 26 gauge. Hiki ke hoʻopili ʻia kēia moʻo o nā huahana i nā lako ea hoʻoluʻu ma nā ʻoihana ʻoihana, kalepa, haukapila, kula, hale, a me nā hale hana like ʻole. Hiki ke hoʻokomo ʻia iā lākou i loko o nā lako hoʻokomo turbine kinoea a i ʻole nā lumi kamepiula e hoʻolōʻihi i ke ola lawelawe o nā lako.