Ko te kaiwhakaoho hiko kore-puna (e kiia ana ko te "kore-puna" me te "whakaoho hiko motuka") he taputapu e whakamahia ana i roto i ngā pūnaha HVAC hei whakahaere i te tūranga o ngā whakaoho (ngā pereti whakahaere hau) me te kore he pūnaha puna kua hangaia. He rerekē ki ngā kaiwhakaoho puna, e whakawhirinaki ana ki te puna hei hoki ki te tūranga taunoa (hei tauira, kua kati) ina ngaro te hiko, ka mau tonu ngā kaiwhakaoho kore-puna i tō rātou tūranga whakamutunga ina motuhia te hiko.

Kua hangaia ngā kaiwhakaoho aukati hau Spring Return mō te whakamahinga whānui o te aukati hau, te takirere hurihuri me ētahi atu taputapu e hiahia ana ki te mahi haumaru-kore. I te wā e mahi noa ana, ka whakakahangia te taputapu e te kaiwhakaoho. Mēnā ka motu te hiko, ka hoki te kaiwhakaoho ki tōna tūranga taketake.