Ko te tokotoko hono kore-upokotakirere ārai hau, hei wāhanga whakahaere matua i roto i ngā pūnaha hauhautanga ahumahi me ngā pūnaha kawe hau, he maha ngā painga nui. Ko tōna āhuatanga matua ko te whakarērea o te hanganga pane takirere motuhake o ngā takirere whakamātao tuku iho. Mā te hoahoa tuku tokotoko honohono whakauru, ka tino māmā ake te hanganga whānui, ka nui ake te kikī o te rōrahi. Ka taea te urutau ki ngā āhuatanga mahi me te tahora taputapu matotoru, me te penapena wāhi tāutanga.

He mea noa te kitea o ngā ārai hau i roto i ngā pūnaha hauhautanga o te wheketere, ngā pūnaha hau hou o ngā ara raro whenua, me ngā paipa hau para o ngā poiha. He mea whānui te whakamahi i ngā takirere pūrerehua i roto i ngā paipa tuku wai o ngā pūnaha wai, ngā pūnaha hauhautanga wai, me ngā hononga tapahi wai i roto i ngā tipu hinu.

Ko te rerekētanga nui i waenga i ngā ārai hau me ngā takirere pūrerehua kei roto i te aronga tono me te hoahoa mahi matua. Ko te arotahi o te ārai hau haurehu ki te whakahaere i te nui o te hau, te ārahi me te tapahi i te rere o ngā hau (ina koa ko te hau, te haurehu me te puehu), ko te mahi matua o ngā takirere pūrerehua ko te whakaweto me te whakahaere i te rere o ngā wai, ngā hau, te mamaoa rānei. Nā te rerekētanga o ngā āhuatanga o te reo me ngā horopaki tono, ka puta he rerekētanga matua i roto i te hanganga, te arotahi hiri me ngā tohu mahi.

Mai i te tirohanga hanganga, ko te nuinga o ngā ārai ārai he maha-mata, he pereti mono, he momo matua takirere rānei. Ko ētahi, pērā i te ārai hau kore-upoko o te tokotoko hono, ka arotau hoki i te ara rere hau mā te tuku tokotoko hono. Ko te hoahoa hiri e aro ana ki te whakaiti i te "tere turuturu hau" kia tutuki ai ngā whakaritenga o te pumau o te rere hau i roto i te whakapūhautanga, te tango puehu, te HVAC me ētahi atu pūnaha. He matua takirere porohita te āhua kōpae o ngā takirere pūrerehua hei matua. Ka huri te matua takirere huri noa i te pou takirere kia tuwhera ai, kia katia ai. Ko te hoahoa hiri e aro ana ki te "ārai i te turuturu" me te tutuki i tētahi taumata ātete pēhanga. He pai mō ngā āhuatanga kawe wai pērā i te tuku wai me te rerenga wai, te ahumahi matū, me ngā paipa wera.

Mō ngā tohu mahi, ka aro nui ake ngā takirere hau ki te tika o te whakahaere i te nui o te hau me te ātete ki te pirau puehu hei whakatau i te pakaru o ngā wāhanga i puta mai i te rere o te hau puehu. Ka aro nui ake ngā takirere pūrerehua ki te tere whakatuwhera me te kati, te ātete ki te pēhanga me te mahi hiri, tae atu ki te roa o te mahi. Me whai kaha hoki ētahi takirere pūrerehua pēhanga teitei ki te ātete i te cavitation.