an apparatus for delivering pressurized , humidified breathable gas to a patient having a sleep - related disorder includes a cpap unit with a blower configured to generate a flow of pressurized breathable gas . the apparatus also includes a liquid storage container configured to hold a body of liquid . the liquid storage container has a gas feed opening , a gas discharge opening and a humidifying region above a metallic heat conducting material . in addition , the apparatus includes a support housing integrated directly into the cpap unit and having a receiving space configured to removably receive the liquid storage container . the liquid storage container is structured such that when the liquid storage container is received by the support housing , the gas feed opening aligns with and engages with an ending portion of a gas feed flow path defined by the support structure and the gas discharge opening aligns with and engages with a beginning portion of a gas discharge flow path defined by the support structure so that the liquid storage container fluidly connects the gas feed flow path and the gas discharge flow path .