Difference between Resmed S8 vs. Resmed S9??

Lots of good features already mentioned. I really like having the flow data and the SD card. Much easier than the Smart card and proprietary reader on the S8.

Another I have found is the machine seems much better at keeping up with my breathing pattern. The S8 seem a little slower to get sync'ed up with. This could just be me though.

One thing I have found strange is the S8 would show a HI of 9 to about 15 almost every night but I have had 1 HI since I started on the S9. Not sure how it should look but the flow data looked pefect when it registered the HI.

dtsm wrote:

jnk wrote:

ozij wrote: . . . The S9 is noticeably quieter, its air supply is somehow smoother, . . .

Would that be true going from an S8 II to an S9? If so, that might actually influence my decision for myself in a year or two.

Yes, S9 super quiet. That's the first thing you notice when making the change.

Interesting, since, according to our hosts, the S9 and the S8 II are both rated in the sound specs exactly the same: 24 dB. And since the OP was asking about a comparison between the S8 and the S9, I wonder how the 24 dB of the S9 manages to seem so much quieter than the 24 dB of the S8 II? Must be something about dampening the transfer of the noise to the hose or something, so that it seems quieter to the one wearing the mask? Just guessing. That's the only way I can figure that two machines with the exact same decibel rating would involve one that seemed, comparatively, "much" quieter than the other.

Could it be that the 24 db from a machine that has 3000000 hours on it is actually a little louder than a brand new machine also rated at 24 db?

I've recently (a bit over a month ago) moved from the REsmed S8 auto to the S9 auto. I had been on the S8 since late 2005.

1. The difference is noticeable - and is a significant improvement. This was completely unexpected for me - as the S8 was already managing my AHI to a very low level. I put it down to the new algorithm. It is also very quiet - marginally quieter than the S8 (which had noise levels so low that they were not a problem).

2. Whilst the S8 had my AHI levels down to (usually) between 2.0 and 4.0, the S9 has then routinely under 1.0 and a couple of times a week at 0.0. I agree with previous comments that it classifies fewer events at Hypopneas and this will contribute to that score improvement. But, even considering that, I beleive there is a significant improvement.

3. The above comments are based on using neither with a humidifier - and I understand there are also significant improvements with the humidifier, including the climate control hose that eliminates rainout.

There's one more that no-one has mentioned... That is the S8 will only let you use the EPR feature when you are running it in non-Auto mode. The s9 lets you use EPR in auto mode, and this clearly makes a welcome difference for those periods when the pressure is running high during the night.

P.S. Someone mentioned earlier about the auto start feature. This works for me on both the S8 and the S9 equally well. I am surprised you couldn't get it working on the S8.

shb wrote: . . . There's one more that no-one has mentioned... That is the S8 will only let you use the EPR feature when you are running it in non-Auto mode. . . . .

Maybe that's because the S8 II DOES provide EPR and Easy-Breathe in Auto mode.

http://www.resmed.com/us/documents/1012 ... nology.pdf

And maybe that is the key with the sound comparison, too. The S8 Vantage is rated 31 dB.

So perhaps part of the confusion has to do with whether the OP is asking for a comparison of the S8 Vantage to the S9 or a comparison of the S8 II Auto to the S9 Auto.

I just got mine a couple weeks ago. It does NOT have smart start with full face masks. The manual specifically states that it does not.

jnk wrote:

shb wrote: . . . There's one more that no-one has mentioned... That is the S8 will only let you use the EPR feature when you are running it in non-Auto mode. . . . .

Maybe that's because the S8 II DOES provide EPR and Easy-Breathe in Auto mode.

http://www.resmed.com/us/documents/1012 ... nology.pdf

And maybe that is the key with the sound comparison, too. The S8 Vantage is rated 31 dB.

So perhaps part of the confusion has to do with whether the OP is asking for a comparison of the S8 Vantage to the S9 or a comparison of the S8 II Auto to the S9 Auto.

Good point you make. I note that the OP (sugarsowner) only said he had the "S8 autoset". Thats what I bought at the end of 2005. Does he have the S8 auto, as I had assumed - or the S8 II auto (as you appear to be saying) ?? Because he's been on this forum since June 2006 I had assumed it was same model as mine. Nice to hear that Resmed updated the S8 (with the S8 II range) and made it marginally quieter and also added EPR to the auto mode. I wrote to them when I received my S8 about the lack of EPR (in auto mode) and that I felt their brochure-ware at that time glossed over that point. Perhaps my feedback helped them move along with correcting their oversight by releasing the S8 II range !

Elle wrote:I don't think any machine will be so different that it prevents you from sleeping. I would look at other causes.

My two brothers in law are using ancient machines and sleep great. I actually slept better with my old F/P non data machine than with my S9 but I am not attributing the change to the machine. ...Maybe you should talk to your doctor before investing in a new machine and finding that it doesn't solve your problem.

I second Elle's comment. Good info here about the machines, but your issue is bettering your sleep, and until you can better determine what the problem is, you're using darts to find a solution.
I hope you have a good sleep DR; i don't and am having challenges myself Good luck. n0hardmask.

One important thing to consider with the new S9's is that they are very likely to make a sound similar to a few owls a bit in the distance, EVERY time you exhale, check out other recent threads for more information. If you don't like birdsounds, you're better of checking out the competition. I'm not bothered by it.

I recently got a brand new S9, as you can se in my signature, I have used a Devillbiss Intellipap Autoadjust for close to 6 months. If I could choose either machine at the same price, I would go for the Devilbiss. It doesn't howl, it is makes less noice at 5 cm/h2o than the S9 at 4 cm/h2o, it feels better buildt, the buttons are not "plasticky" like on the S9, I prefer having the humidifier below the machine and I prefer the autoadjust algorithm on the Devilbiss (the S9 algorithm is fine also).

My father who is 83 years of age, was recently diagnosed with severe obstructive sleep apnea. The doctor recommended RESMED S9 / S8 AUTOSET or equivalent with NANO or N10 AirFit + chin strap. I welcome any advice on features to look for that will facilitate better compliance at this age.

bcollins wrote:My father who is 83 years of age, was recently diagnosed with severe obstructive sleep apnea. The doctor recommended RESMED S9 / S8 AUTOSET or equivalent with NANO or N10 AirFit + chin strap. I welcome any advice on features to look for that will facilitate better compliance at this age.

You've posted in an old thread so you may not get as much traffic. I would suggest that you start a thread of your own devoted just to you.

The S8 Autoset was discontinued back in 2010 I think it was.
The S9 AutoSet hasn't been officially discontinued but once the shelf stock of those are gone there won't be any more.
ResMed just released the new AirSense 10 AutoSet...last month.
The Nano is the ResMed Swift FX Nano...it's a good mask for a newbie to try who was wanting a nasal cushion mask...lightweight, comfortable. I have used it with success The AirFit N10...I haven't seen to compare it to anything else. We do have some people using it. It's a different style than the Nano which the Nano is more minimalistic in terms of headgear especially.
You can check both of them out here.
https://www.cpap.com/cpap-masks/nasal-c ... #1:2::::30: