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These humidifier water chambers are designed to work with all M-Series Heated & Cool Passover Humidifiers.
Compatibility Information: Two chamber designs are available for MSeries Humidifiers: the R2B (Part 1003757) with side-by-side openings and the R3B (Part 1003758) with staggered openings. If you are unsure of which chamber you need, review the MSeries Chamber Differences Guide (PDF).
Great perfect fitBy Richard, 06-23-2016
Fast service great replacement By Bill T, 05-10-2016
Works Great... It is doing the job. By Thom H, 12-29-2014
It was great finding an exact replacement for my M-Series RemStar Humidifier Water Chamber. The replacement part is an exact match to the factory original. The website described the differences in the various chambers that were utilized for my humidifier making it snap to order the right one. CPAP Exchange has always been my "goto" online supplier for parts and accessories. As a company, they are quick, accurate and cost effective for me. Two Thumbs Up...Five Stars...well, you get the idea!By Jose A, 08-13-2014
Products are the same as my insurance and I pay a fortune for at a reasonable cost. By Rhonda, 02-24-2014
The new reservoir fits perfectly. I really like the flip latch over the old slide latch. Now I don't have to press down on the lid to slide the latch. The seals line up perfectly and it no longer leaks. I should have gotten this replacement years ago.By R. Pein, 05-16-2013
This new chamber has an improved design that fits better and is easy to clean. The new end clip is superior to the old sliding clip that was failing. I am very pleased.By DreamChick, 12-29-2012
Not much to really comment on a humidifier, it fits my machine just like the old design.By Nadine, 10-04-2012
I haven't had to buy a new water chamber in a while. This design is an improvement over the older one. It doesn't have a rubber seal which will start to wear out and leak over time.By Alice Dixon, 03-27-2012
Low cost, rapid shipment!By Ivan, 02-25-2012
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