If the filter becomes very dirty or wet, machine performance can be affected. It is easy to see the condition of the filter. Replace when it becomes discolored. Heated humidifiers can cause water to collect in the filter chamber, thus clogging the filter and adversely affecting therapy. If wet, remove the filter from use and set out to dry. Dry time may vary.

This filter may have an impact on the ability of any Auto Adjusting CPAP to accurately respond to airflow restrictions during use. If the average treatment pressure is below a pressure of 7cm H2O this should not be used.

CPAP and BiPAP machines with Auto On/Off Feature. The Auto On/Off Feature has a difficult time sensing air flow, which helps determine whether the machine is in use or simply blowing air. Our tests show the Auto On/Off feature does not work with the following machines:

• ResMed S8 Vantage
• ResMed S8 AutoSet II
• ResMed s8 VPAP
• ResMed s8 VPAP Auto 25
• ResMed VPAP Malibu

If a Whisper Cap is used on a M Series machine without a heated humidifier, it will not fit if used together with a outlet bacteria filter. If you wish to use both a Whisper Cap and a outlet bacteria filter without a heated humidifier, then you should add a Hose Quick Connect or a M Series Tubing Swivel between the cpap machine and the outlet bacteria filter.

As always, just call if you have any questions.