"VERIFIED CPAP.COM CUSTOMERthe elbow includes a filter which reduces cold air motion around the face, and is quieter"
April 29, 2016
Fisher and Paykel has created an improved, diffusing elbow that deflects exhalation pressure and reduces audible noises related to the exhalation ports. A diffusing filter sits secured, between the exhalation ports and the diffuser cap.
Manufactured by Fisher & Paykel.