This hypoallergenic disposable replacement filter is designed and compatible with the (ResMed AirSense 10 CPAP machines & ResMed AirCurve VPAP machines). The filter size (LxWxH) is specific to these devices and allows the air to be properly filtrated by the machine. The machines pull from the room air when providing the user a positive airway pressure and the filter is the last line of defense for air pollutants.
The recommended replacement is monthly. And should be followed as a dirty filter can cause the machine to malfunction. In some severe cases, it can cause complete failure. The frequent replacement of the filter ensures the user receives the best quality of air from their CPAP machine.