✅ Wehewehe hinu o waho: Whakakapinga tātari tere me te watea, ka penapena nui i te wā tiaki me ngā utu mahi.
✅ Pūmau, ā, he roa: Ka whakamahia te hangarau Tiamana, ka tutuki ai te tika tātari tae atu ki te 3ppm, ka tiakina pai ai te wae matua.
✅ Teitei te whai huatanga me te penapena pūngao: Ka whakarerekē te pūnaha whakahaere atamai i te nui o te hauātanga ina hiahiatia, ka whakaiti i te whakapaunga pūngao.
✅ Mahi iti-haruru: He hoahoa ahurei, ka taea te iti o te haruru mahi ki raro iho i te 62 decibels. 
O mua: He tino pai te whakaurunga o te pūwero hau wehewehe hinu o waho a DUKAS, ā, he iti noa iho ngā toenga hinu. Panuku: Pūwero hau wehewehe hinu o waho DUKAS: he pai ake te tiaki paerewa, he iti ake te mōrearea o te parahanga.