As continuous positive airway pressure is the treatment of choice for OSA, a mask is vital in ensuring the effectiveness of therapy delivery. The study will evaluate the performance and usability of the new mask vent. This is done by comparing the apnea-hypopnea index (AHI) of patients, who will apply 2 different washing procedures to the new mask, at the end of the study and their baseline data obtained at the beginning of the study.The study will also assess the breathing comfort as well as obtaining subjective data on the usability of the new mask vent system.

Inclusion Criteria:

• Subjects who are using ResMed mask
• Subjects willing to provide written informed consent
• Subjects who have been treated for OSA > 6 months
• Subjects who can read and comprehend English
• Subjects ≥ 18 years old
• Subjects who are using a ResMed S8 or S9 device

Exclusion Criteria:

• Patients who are pregnant

• Patient on bi level treatment

• Patients being treated for OSA < 6 months

• Patients who have a pre-existing lung disease/condition that would predispose them to pneumothorax (for example: COPD; lung cancer, fibrosis of the lungs; recent (<2 years ago) case of pneumonia or lung infection; lung injury).

• Patients who are deemed unsuitable by the researcher due to the following reasons:

  • They do not comprehend English
  • They are unable to provide written informed consent
  • They are physically unable to comply with the protocol