Which M Series Chamber Should I Order?

Here are two documents to help you identify which chamber to order.

• How to Identify the Correct Chamber

• How to Tell If I Need an R3 Chamber

If there is any doubt about which one to choose, then order the Universal Kit. The Universal Kit comes with a Universal Base, an R2 Lid, and an R3 Lid and will work in any M Series Humidifier.

Contact our customer service department for further assistance. 800-356-5221.

The is the replacement water chamber for the Respironics M Series Humidifiers.