Ko te miihini i hangaia mo te ruma inenga o te hohipera, te whare taiwhanga taiwhanga, te hua tiaki hauora, te wheketere rongoa waenga-iti, ka whakaatuhia e te tinana miihini kiato, ngawari te mahi, te maha-mahi, te whakatikatika whiu. He pai mo ALU-ALU me ALU-PVC mōkihi rongoa, kai, wahi hiko etc.
Momo ara miihini-taputapu motuhake o te maka miihini-turanga, ka mau ki te mahi o te backfire, te hökeke, ki te hanga i te turanga miihini me te kore he distortion.