Another Humidity Question

All,

I see there are a few humidity question postings this morning. I just wanted to verify that I finally understand how the Resmed S9 is doing it. My older post on the subject fell off a while back.

From reading postings and on Resmed's site, it looks like for AUTO according to Resmed, "the heater plate temperature changes to ensure a constant humidity level. Heater plate temperature depends on the ambient (room) conditions, the humidifier setting and the air flow".

I'm assuming that this humidity level is the 80% often mentioned.

When Resmed says, "the moisture output for any given humidifier setting does not change, irrespective of changes in ambient conditions or air flow", I assume this is for the given manual setting. Thus, I would conclude that in manual the machine outputs the constant selected humidity and what one gets at any given time at the end of the hose will vary with the ambient conditions, and air flow.

Please correct if way off! Anyone care to give a brief recap of how Phillips does it on the 60 series. Thanks.

Best,

Mike

Depends on if you are using the heated hose or not.

For how PR S1 does it with its heated hose...
see the product literature...2 settings that are independent of each other is the default when the heated hose is attached.
https://www.cpap.com/productpage/pr-sys ... ifier.html

This humidifier offers three levels of humidification (70, 80 or 90 percent) and the heated tube has five levels of temperature available, ranging from 4 to 16 degrees above the room temperature.

Without the heated hose and only using the new system one humidification system...who knows what we really get but ambient humidity plays a huge part. I really didn't care for it myself nearly as much as with the heated hose. It uses less water I know that and it doesn't warm the air up enough to suit me in the winter even at max humidity.

I assume that the same thing could happen with the S9 when the Climateline is not used and settings are manual for humidity delivery with no control of air temp. I have never used my S9 without the Climateline to compare things but I have used my PR S1 with and without their heated hose.

Thanks Pugsy.

From reading your link, I take it the Phillips with heated hose has the 3 settings (70,80,90) plus temp that work like the 1 auto setting on the Resmed with climateline. They factor everything to give you and keep you at the % you select .

With the Resmed in manual or the Phillips without heated hose, they just deliver a preset amount that will vary based on the ambient conditions I've never understood why Resmed didn't offer more auto setting choices. Clearly, they have the capability built into the machine.

I say all this because with the Resmed in manual I never know what I get just as you note. My room humidity can vary dramatically by day, and it certainly makes a difference.

With the Resmed S9, has anyone ever seen a chart that gave a baseline for manual settings under a fixed set of conditions? It seems I saw this for the newer S10 models. At least that would give us a starting point.

Best,

Mike

The Resmed has 2 manual and 1 automatic settings for humidity. The first manual setting, is the factory default standard that is used with a non-heated hoses. This setting has a humidity number that has no correlation to any ambient condition. The other two settings are designed to be used with Resmed's Climateline heated hose. The default for the Climateline is the automatic mode and is activated when the user connects the hose to the Resmed via electrical contacts. At this point the default in automatic is a 80% humidity and an 80 degree temperature setting, The user has the option in this mode to adjust the temperature only. The last mode is the manual Climateline setting. This mode allows the user to control the temperature and the humidity level. While I haven't seen this in writing, I've noticed that the default value for the humidity level when it's first switched to the manual setting is a value of 8. Based off of this I suspect that the numbers in this mode now correspond to a humidity level. (e.g.: 3.5=35%, 5.0=50%).

One last note. If you have the S9 in the Climateline manual mode and wish to return it back to the automatic mode, you will have to totally power down the unit after making the change before it will take affect.

I hope I've provided you with the information you require.

SGearhart wrote:The Resmed has 2 manual and 1 automatic settings for humidity. The first manual setting, is the factory default standard that is used with a non-heated hoses. This setting has a humidity number that has no correlation to any ambient condition. The other two settings are designed to be used with Resmed's Climateline heated hose. The default for the Climateline is the automatic mode and is activated when the user connects the hose to the Resmed via electrical contacts. At this point the default in automatic is a 80% humidity and an 80 degree temperature setting, The user has the option in this mode to adjust the temperature only. The last mode is the manual Climateline setting. This mode allows the user to control the temperature and the humidity level. While I haven't seen this in writing, I've noticed that the default value for the humidity level when it's first switched to the manual setting is a value of 8. Based off of this I suspect that the numbers in this mode now correspond to a humidity level. (e.g.: 3.5=35%, 5.0=50%).

One last note. If you have the S9 in the Climateline manual mode and wish to return it back to the automatic mode, you will have to totally power down the unit after making the change before it will take affect.

I hope I've provided you with the information you require.

Thanks. I guess I'm still wanting to verify that only the auto climateline mode takes into account ambient humidity, pressure, etc. to deliver the 80%. The machine varies moisture output based on these parameters to keep humidity consistent?

In the manual modes, the machine has fixed moisture output per user selection and actual humidity may vary based on the aforementioned parameters?

Your take on the humidity presets for the numeric manual settings seems logical to me.

I'm sorry if a little dense this morning. Night gremlins got me!

Best,

Mike

I prefer the customization available on the PR S1 heated hose options but that said...I do well with the Climateline set to auto or even manual. For me (my nasal mucosa can't get too much humidity) all I have to do is max it out at whatever it is going to give me and adjust the temp per season (or household temp) and the % of difference between 70 to 80 to 90 really doesn't matter.
My nose only gets mad when things dry out and as long as I am getting enough to keep my nose happy then I just leave it alone.
I would get in more trouble trying to second guess the humidity setting and factoring in ambient room humidity and just screwing around with things.
If it's raining outside and the windows are open and ambient humidity is rather high...I still leave it at my usual settings and the machine simply doesn't use as much water as it does when the ambient humidity isn't so high.
My nose is happy with the 80% that the S9 with Climateline and automatic selection...just like it is happy with the 90% available on the PR S1. Palerider is correct...I would probably do well breathing water ...but my nose is really happy with the moisture and I have had things get too dry and it's a miserable feeling that takes days to go away.

So I prefer set it and forget type of thing and I don't spend any time trying to figure out exactly what I am getting in terms of humidity .....all I care about is whether or not my nasal mucosa are happy because if they aren't happy I am not happy with the congestion.

Oh...and for those wondering...where I live isn't all that dry in general but it's probably not quite as humid as further south.
Right now...at approx noon with sun shining and not a cloud in the sky and temps in the mid 50s and climbing...the humidity is 49% and quite common for this area at this time of day.
When I lived in Las Vegas where it is hugely drier in general...my nasal mucosa were always giving me fits and that was before I ever started cpap therapy.

Just saw this question

I guess I'm still wanting to verify that only the auto climateline mode takes into account ambient humidity, pressure, etc. to deliver the 80%. The machine varies moisture output based on these parameters to keep humidity consistent?

and yes..in automatic mode the machine will indeed still factor in ambient humidity...if it's raining outside and your windows are open which will bring up the house humidity...what happens is not much water is used. The machine won't need to add much, if any water, so it won't use much.

The manual mode...still uses those humidity sensors though but ResMed never really tells us how or what they do.
In manual mode the ambient humidity will still be a factor but we just can't quantify how much of a factor.
It would work like the PR S1 works with its sensors in the new system one humidification mode and no heated hose.
Verified by all the S9 users who come here and wonder about water usage varying with their non heated hose being use...most often wondering why they aren't seeing the usual amount of water consumption and upon further detective work we find out it has been raining a lot lately.

Pugsy wrote:My nose is happy with the 80% that the S9 with Climateline and automatic selection...

Me too for the most part. Every now and again, I would like a little more or little less. It would be nice to have a few other selections on the Resmed. I can't find a manual setting that works for me on a consistent basis at all.

Pugsy wrote:The manual mode...still uses those humidity sensors though but ResMed never really tells us how or what they do.
In manual mode the ambient humidity will still be a factor but we just can't quantify how much of a factor.
It would work like the PR S1 works with its sensors in the new system one humidification mode and no heated hose.
Verified by all the S9 users who come here and wonder about water usage varying with their non heated hose being use...most often wondering why they aren't seeing the usual amount of water consumption and upon further detective work we find out it has been raining a lot lately.

Thanks. I guess the water level usage verifies the sensors are still in play. You wouldn't think pressure or the other factors would impact the water level as much. Perhaps, it's a rainout prevention accomodation. If operating in manual on a hot stormy day with the windows open, any higher fixed moisture output could make it pretty miserable quickly if not taking into account ambient humidity at least to some degree.

Really appreciate the info. I think I finally have an understading of it. It's only taken months.

Best,

Mike

Macpage wrote: You wouldn't think pressure or the other factors would impact the water level as much

Pressures will affect water consumption somewhat...so will leaks but mainly it's ambient humidity that is the major factor in most situations. My pressures always vary widely no matter what the water consumption is. Sometimes my leaks vary widely too.
I have used my S9 with Climateline set to manual and humidity set to 5...it does as well for me as the automatic selection does.
Am I getting more than 80%? Beats me, and I suppose it is very possible but since I do just as well on automatic I leave it at that.
But I did try it on manual but I never tried it with less than setting of 5 (though I probably changed the temp) because I was afraid to since I have so many miserable issues when my nasal mucosa dry out and I just didn't want to risk it.
Besides...I am lazy and prefer the "set it and forget it mentality".