Ua hoʻohana ka valve butterfly uila i ka mea hoʻokele uila e wehe a pani i ka mea hana, pono e hoʻolako ʻia ka pūnaewele me ka mana, ʻo ke kumu o ka hoʻohana ʻana i ka valve butterfly uila e hoʻokō i ka mana uila non-manual a i ʻole ka mana kamepiula o ka wehe a pani ʻana a loulou hoʻoponopono.Nā noi i loko o ka ʻoihana kemika, ka meaʻai, ka ʻoihana ʻenehana, a me ka ʻoihana sima, ʻenehana ʻenekini, nā mea mālama wai, nā ʻōnaehana HVAC kūlanakauhale, a me nā ʻano ʻē aʻe.