He iti te haruru, e hanga ana i tētahi taiao awheawhe e pai ake ana mō te taiao. He iti ake te tere o te mahi a te pūwero e rua-wāhanga, ā, nā te mea he ātete haruru kua kati katoa, he iti te haruru mahi ki te 68-72 tekipere, e whakakore ana i te haruru nui, e whakapai ake ana hoki i te whakamarie mahi.
He nui te kaha o te tuku hau hei whakatutuki i te hiahia hau pokapū. Me te awhe nekehanga hau o te 5-100 m³/min, he tino pai mō te tuku hau pokapū i roto i ngā wheketere, ngā raina whakaputa nui, me ngā āhuatanga e nui ana te whakamahinga hau pērā i ngā kakahu, ngā hikohiko, me ngā matū.
