I-Air Handling Unit (AHU) ingenye yezingxenye ezibaluleke kakhulu zemishini yemvelo esetshenziselwa ukutshala amakhowe.Amakhowe adla i-O2 emoyeni futhi akhiqize i-CO2.Kudingeka sinike amakhowe umoya owanele ukuze aphefumule futhi sisuse iCO2 kuwo.Ngaphandle kokunikeza amakhowe umoya, sidinga ukoma noma sibe manzi, ukuze siphole noma sishise umoya kuncike esimweni sezulu sangaphandle kanye nesigaba esincane sokukhula.Yonke le misebenzi kufanele ihlinzekwe ngokugcwele yi-AHU ngokunemba okusethiwe.