Application-level segmentation translates therapeutic categories into utilisation settings, revealing funding flows and margin structures. Hospitals dominate absolute sales because they capture emergency decompensation of COPD and asthma, surgical admissions complicated by sleep apnea, and high-acuity infectious cases; procurement is centralised, favouring nebulised drugs and ventilators with service contracts. Ambulatory surgical centres concentrate on titration of positive-airway-pressure devices and pulmonary rehabilitation, generating lower revenues but faster turnover. Home care is the value-growth pocket, propelled by reimbursement shifts toward readmission penalties and portable modalities such as CPAP, oxygen concentrators, and smart inhalers that transmit adherence data. Clinicsโincluding pulmonology, allergy, and sleep practicesโact as gatekeepers, prescribing the majority of maintenance therapies and thus shaping brand share despite limited direct device sales. Lastly, online pharmacies constitute an emerging channel, gaining traction for resupply of masks and replacement inhalers; while still a single-digit share, they reshape pricing transparency and patient persistency across the Breathing Disorders & Treatment segmentation landscape.