This is achieved via the controlled distribution of these supplied fluids by a chamber environment controller (CEC) unit to a habitat conditioning unit (HCU) within the DDC. Once commissioned the above arrangement provides controlled delivery of heating, cooling and dehumidification capacity to a DDC, in order to create and maintain optimum living conditions for saturation diving personnel. The Divex branded heater chiller skid (HCS) a packaged and fully self contained unit.