Ko te taherapa te ahua o te poihau.Me mahi te whakarite taherapa ki roto i te taika whakangao.Ka honoa te kaikawe koromamao ki te taika whakangao, ka pehia te taherapa maori ki roto i te tank whakangao.Whai muri i te taapiri i te nui o te wai me te otinga rauemi awhina, ka huri te miihini mamaoa, ka whakamahana te mamaoa wera nui ki te paipa.Ko te wai i roto i te tank whakapuru ka tae ki te 80°C, ka whakamahana autaki te taherapa i roto i te koti o te tank whakangao kia tino uru ki te wai me nga otinga rauemi awhina.
Ko te whirihoranga taherapa te mahi whakarite mo te hanga poihau.Ko te mahi tuatahi i roto i te hanga poihau ko te horoi pokepokea.Ka taea te hanga poihau poihau ki te karaihe, te konumohe, te kowiri tira, te karaera, te kirihou, me etahi atu;ko te horoi i te pokepokea ko te whakamakuku i te maaka karaihe ki te wai wera.Ko te pāmahana o te puna wai wera e te Si steam generator ko 80°C-100°C, kia taea te horoi te pokepokea ai karaihe, ka hoatu ki te hanga watea.
I muri i te horoinga i pokepokea ai, ka whakakikoruatia te pokepokea ki te konupūmā pākawa, koinei te wahanga o te taherapa whakauru.Ko te mahi toua o te poihau me pupuri te pāmahana kapia o te tank ruku ki te 30-35°C.Ka tere te whakamahana i te taika rukuhia e te kaihanga mamaoa hau, ka whakahaeretia te pāmahana kia piri pai ai te taherapa.i runga i nga pokepokea karaihe.
Muri iho, tangohia te makuku i runga i te mata o te poihau kia tangohia atu i te pokepokea ai.I tenei wa, me whakamaroke mamaoa.Ko te wera e puta mai ana i te hanga mamaoa he rite tonu, ka taea te whakahaere, kare e maroke rawa.Ko te mamaoa teitei me te haumuku pai ka taea te whakamaroke tere i te taherapa.Ko te reeti tohu o te poihau kei runga ake i te 99%.
I roto i te raina whakaputa katoa o te poihau, he mahi nui te kaihanga mamaoa.Ka taea e ia te wera tere i runga i nga whakaritenga o te tukanga, me te pupuri i te pāmahana i te pāmahana tonu.He nui te painga o te mamaoa wera nui ki te whakapai ake i te kounga me te pai o te hanga o te poihau.
He 98% te kaha o te waiariki o te miihini korowha hau Nobeth, kare e heke ki te wa e whakamahia ana.Ko te hangarau ngingiha hou ka tutuki i te iti o te wera hau ngongo, te kaha teitei me te iti o te kohi hiko.