Apparatus for use in a respiratory support system

An apparatus for use in a high flow respiratory support system for delivering humidified gas to a user or patient, the apparatus comprising:

• a humidifier chamber that is in pneumatic communication with a gases source, or that is configured to be placed in pneumatic communication with the gases source;
• and
• an inspiratory conduit that is in pneumatic communication with the humidifier chamber downstream of the humidifier chamber, or that is configured to be placed in pneumatic communication with the humidifier chamber downstream of the humidifier chamber, the inspiratory conduit configured to be reused between multiple different patients;
• and
• a filter that is in pneumatic communication with the inspiratory conduit downstream of the inspiratory conduit, or that is configured to be placed in pneumatic communication with the inspiratory conduit downstream of the inspiratory conduit, the filter positioned closer to the patient interface than the humidifier chamber, wherein the filter comprises a first locking mechanism extending from a first end of the filter to secure at least one of the inspiratory conduit and the patient interface, the first locking mechanism comprising a sealing member positioned between the first end of the filter and an end of the first locking mechanism;
• and
• a patient interface for delivering humidified gas to a user or patient, wherein the patient interface is in pneumatic communication with the filter downstream of the filter, or is configured to be placed in pneumatic communication with the filter downstream of the filter;
• wherein the apparatus is configured to be used in a high flow respiratory support system;
• wherein the apparatus is configured to deliver humidified gas of 20 L/min or more to the user or patient;
• and
• wherein the patient interface comprises a non-sealing interface.