Ua kālele ʻo San Ao i ka moʻo pahu hau, ka ʻōnaehana hōʻike thermostatic, ka hana a me ka hana ʻana o nā keʻena kūikawā, ka hoʻohana ʻana i nā kaʻina hana kiʻekiʻe a me ka ʻōnaehana hoʻokele koʻikoʻi e hōʻoia i ka huahana o ke kiʻekiʻe kiʻekiʻe, kūpaʻa kiʻekiʻe kiʻekiʻe a me ka mālama ʻana i ka ikehu.Hoʻohana nui ʻia nā huahana i nā hale kūʻai, nā hale kūʻai, nā hale kūʻai maʻalahi, nā hale kūʻai waina, nā hōkele a me nā wahi ʻoihana ʻē aʻe.
Loaʻa i ka hui nā laina hana ʻoihana, nā lako hana kiʻekiʻe i ka ʻoihana refrigeration a me nā laboratories hoʻāʻo maikaʻi.I kēia manawa, i mea e hoʻokō ai i nā pono o nā mākeke ʻē aʻe a me kēlā me kēia mea kūʻai aku, ua hana ka hui i nā huahana i hoʻomaikaʻi maikaʻi ʻia, i hiki ke hoʻokomo pono ʻia nā huahana, hōʻike, hoʻomaʻemaʻe a mālama ʻia.A maʻalahi a maʻalahi nā kaʻina hana ʻē aʻe.Eia kekahi, ua hala nā huahana i nā palapala hōʻoia honua e like me "CCC", "ICE", a me "CE".