Patent ID: 8550075

Claim:
Humidifier apparatus for a respiratory apparatus, comprising: a housing having a gas inlet and a gas outlet on either side of a substantially-flat center section; a base plate supported by an internal shoulder of said housing and forming a bottom wall of said housing, wherein a gas flow path is defined in said housing between said gas inlet and said gas outlet; a heater apparatus; and a water supply distribution member configured and arranged to deliver water vapour to the gas flow path, said water distribution member comprising an envelope formed by a first compartment wall and a second compartment wall joined together, and a water inlet into the envelope; wherein the water distribution member is supported within said housing by said base plate and said internal shoulder, and in thermal communication with the heater apparatus which is supported on the base plate, in a space between the base plate and the water distribution member, and further wherein said gas flow path is substantially parallel to the base plate and the water supply distribution member.