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Foam Removal - Philips System One
#31
RE: Foam Removal - Philips System One
Thank you drwooddr. Yours is the first post I've seen by a System One owner who received a confirmation letter.

I suppose mine is "in the mail".
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#32
RE: Foam Removal - Philips System One
I just find it curious that I got the confirmation letter for my System One before the Dreamstation Go, which I had submitted a day earlier. Your mind starts to wonder: Did the registration go through OK on the first submission? Are they prioritizing the System One over the Dreamstation Go because it's older? Or is the foam issue worse? Who knows.

And I just happened to sit down last night to take apart my System One to remove the foam, but found that my torx bits are too fat to fit in the deep holes to remove the screws, so a torx screwdriver set is on order. It looks much easier to remove the foam from the System One than my Dreamstation Go, so I will most likely go back to using my old machine.
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#33
RE: Foam Removal - Philips System One
I removed the foam from my System One yesterday and used it last night. It’s 9 years old, and I purchased a Dreamstation Go 18 months ago for travel, but I liked it so much I started using it full time, so my System One has been sitting idle as a backup. Therefore, I wasn’t too concerned about voiding any warranty, etc.

I removed the foam following the video at the beginning of this thread, which was excellent. Foam looked intact, and I cleaned the unit as much as I could, and did not find any black specks. I did not change the pressure setting and did not use the humidifier, but I did add an AB filter on the outlet just in case anything was still in the motor housing. Unit did not seem any noisier than before, and I had an AHI of 1.5 last night, which is about what I was getting with the Dreamstation Go.

I don’t want to mess with the foam in the Go since it’s my new machine, I’d want Phillips to replace/repair it, and removal looks a bit more involved than on the System One. So it looks like I’ll be using my old machine until Phillips gets around to doing whatever they plan to do.
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#34
RE: Foam Removal - Philips System One
"I did add an AB filter on the outlet just in case anything was still in the motor housing"

After you use the AB filter a few times for peace of mind you can get rid of it. The AB filter can affect pressure, air flow and sensor readings in ways that aren't clearly understood. Philips adamantly recommends no AB filters on recalled xPAP machines.

The problem caused by foamless operation is that the intake air is no longer forced to pass exclusively through the filter at the back of the System One. Over time dust will accumulate inside the machine, just as it does inside computer cases.

I believe the major point of unfiltered air entry is the port where the sdcard is located. It just occurred to me this morning that there probably are safe ways to cover that opening. The covering needs to be removable when desired by people using OSCAR, Sleepyhead, etc.

The opening can be covered with tape, but that exposes you to the tape's adhesive. A better covering probably will be a small piece of Saran Premium Plastic Wrap which is a thin film of LDPE (low-density polyethylne). LDPE does not off-gas. It is very stable and unlikely to produce particles. Do NOT grab any cling wrap you have on hand. Most brands don't disclose technical details, and some are PVC, not LDPE. Alternatively a piece of food grade wax paper or parchment paper could be taped over the opening, with all edges sealed by the tape.

There can be unintended consequences from trying this idea. The opening might serve as a passive escape route for heat. The opening's little plastic cover looks like it is deliberately ported.

The plastic case of a System One is a very poor conductor of heat. I doubt that heat is a problem while the machine is in use, but heat might accumulate after the machine is turned off. My machine consumes 2 watts when turned off. It is generating about 6.8 BTUs of heat per hour.

In the long run the best solution is to replace the foam with something safer that is the same size, shape, thickness and durometer softness.

Speaking of which, does anyone have a piece of System One foam and access to a durometer?
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#35
RE: Foam Removal - Philips System One
SingingSam, thanks for your comments and suggestions. I know about the recommendation to not use an AB filter, and I do plan on removing it at some point. I’m sure there are some ramifications to removing the foam, but at this point I don’t see a better alternative compared to: 1) stopping therapy completely, 2) continuing to use my Go with the foam and wait for Phillips, or 3) trying to buy a new machine, which I read are hard to find and expensive right now.
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#36
RE: Foam Removal - Philips System One
Removing the foam from the Go is actually quite easy. I did it on mine. The only part I might consider to be a bit of a hassle is slowly pulling the foam out through the intake hole. (no need to cut anything)
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#37
RE: Foam Removal - Philips System One
(08-22-2021, 06:46 AM)SingingSam Wrote: Thank you drwooddr. Yours is the first post I've seen by a System One owner who received a confirmation letter.

I suppose mine is "in the mail".

I got 2 emails on Aug 19. The first had the confirmation number as all zeros. The 2nd was a correction with the correct number.

No useful info though. 

"Currently, we are processing the device serial number registrations that have been received and are actively working with global competent authorities on the remediation process. Our organization is working diligently to replace or repair devices as soon as possible. Based on current estimates of impacted devices worldwide, we are working towards completing this effort within approximately 12 months."
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