He aha te hau whai rawa, ā, he aha te mea e ruku ai ngā kaihopu ki te hau whai rawa?
Ko te hau whakapakari, e mōhiotia ana hoki ko te nitrox, he momo hau kei roto neke atu i te 21% hāora. Ko te 21% te hāora o te hau e manawapa ana mātau i runga i te whenua. Ko te painga matua o te whakamahi i te hau whakarei ko te whakawhānui i te wa o te ruku, me te whakaiti i te hiahia ki te pana ki te rohe whakaheke. He tino painga tēnei painga i te ruku hohonu. Hei tauira, i te 80 waewae te hohonu, ka taea e te hau noa te noho mo te 30 meneti, i te mea ka taea e te hau whai rawa o te 32% te hāora te noho mo te 45 meneti, ka taea e te 36% te noho mo te 55 meneti. Ahakoa he tino painga te hau whakarei ki te whakawhānui i te wa i raro, he mea nui kia whakangungu nga kaihopu ki te whakamahi i mua i te ruku ki te hau whakarei.