This filter is used in conjunction with the machine's inlet air filters to provide an additional level of air filtration. It is compatible with all CPAP and Bilevel machines, Respironics Cough Assist, and most mechanical ventilators. It installs easily between the machine and the breathing tube.
** To reduce the possibility of reduced machine performance, replace these filters when they become visibly dirty. Clear plastic shell makes it easy to see the condition of the filter - replace when it become discolored. This filter may have an impact on the ability of any Auto Adjusting CPAP to accurately respond to airflow restrictions during use. Not recommended if the average pressure is below 7cm H2O.