Control of flow and/or pressure provided by breathing apparatus

A method of controlling a high flow therapy apparatus providing humidified fluid flow to a patient, the method comprising:

• operating, based on feedback from one or more sensors, a flow generator and a humidifier to generate humidified fluid flow at a high flow therapy flow rate to provide to the patient, wherein the flow generator is in a housing and configured to generate fluid flow, wherein the humidifier is configured to humidify the fluid flow;
• measure, using the one or more sensors, a breath flow parameter of the patient using the apparatus, the breath flow parameter comprising respiratory rate, or one or more parameters derived therefrom, wherein the one or more sensors are in the apparatus, wherein the one or more sensors are configured to measure at least one or both of pressure or flow rate;
• select a baseline breath flow parameter from a plurality of breath flow parameters measured during a predetermined period based on an operating status of the high flow therapy apparatus;
• and
• alter the operation of the flow generator to increase or decrease the high flow therapy flow rate provided to the patient based on a comparison of the baseline and a on-going breath flow parameter,
• wherein the humidified fluid flow is provided to the patient via a conduit, and
• wherein measuring the breath flow parameter of the patient comprises measuring breath flow of the patient through the conduit.