Humidifier for respiratory apparatus

A heatable conduit for use in a respiratory apparatus for delivering breathable gas to a patient, the heatable conduit comprising:

• a first segment comprising one or more heater wires;
• and
• a second segment comprising one or more heater wires,
• wherein, each of the first and second segments comprises a spirally wound elongate body,
• wherein the one or more heater wires of the first and second segments are configured to be connected in use to at least one controller such that, in a first mode, power is provided to the one or more heater wires of the first segment and no power is provided to the one or more heater wires of the second segment.

A heatable conduit for use in a respiratory apparatus for delivering breathable gas to a patient, the heatable conduit comprising:

• a tube;
• and
• a flexible heater supported on the tube and configured to heat the breathable gas flowing through the heatable conduit,
• wherein the flexible heater comprises multiple segments, and each segment forms a heating zone to provide different temperature zones along the length of the conduit, and
• wherein each heating zone is independently controllable.