He maha nga waahanga o te punaha hau i roto i te motuka. Ko ia waahanga he mahi motuhake me te hono ki etahi atu. Ko tetahi waahanga nui i roto i te punaha whakamahana motuka ko te condenser. ka whakaheke te whakamahana ka hoki ki te ahua wai.Ka rere te whakamatao wai ki te whakaeto i roto i te papatohu, ka whakamatao i te whare.