Rainout with Climateline and Warm Room Temp.

[SleepAndBreathe]

I am using the Resmed Vauto with the Climateline hose and am having rainout when I set the humidity manually (woke up to water sputtering sounds and droplets in mask).  

My settings at time of rainout:
- Vauto mode
-humidifier at 8
-tube temperature at 81 F
-my room temperature is consistently 77 F (my room AC is auto set to 77 F)
-machine is on a bedside table that is lower than my bed. 

I have not experienced rain out when the Climate Ctrl is on Auto.  But I would like to have more humidity due to a dry nose, so this is why I would like to use the manual Climate Ctrl to manually set the humidity.

Thank you.

[mrmagloo]

Try setting the humidifier to 7 and see what happens. Might have to try 6 if not. Or you can also try increasing the hose temp.

Typically, if you feel you need more humidity, you slowly raise the humidifier one setting at a time.

[staceyburke]

Isn’t 8 as high as it can go?

[mrmagloo]

Yes, 8 is maxed out and probably well beyond a reasonable setting. In Auto mode, the humidifier is targeting to maintain a humidity level of 85% regardles of the environmental humidity, so unless there is a massive leak or other issue going on, going to 5 or maybe 6 should be more than enough. Going straight from Auto to 8 is certainly causing the rainout without a proportional increase in the hose temp as well. Imho, only go as high as you need.

[kappa]

I've found the humidifier settings on Resmed when using climateline to be pointless (and partially defeating the purpose of having climateline!). Better to just set climate control to Auto and adjust the tube temperature to the lowest you are comfortable with - increasing the tube temp with auto humidity increases water consumption so may improve your dry nose.

Brownell (UK) have an interesting summary on the Basics of Humidity, Relative Humidity and Temperature. For a given relative humidity (such as the 85% RH that climateline tries to maintain in auto climate control mode) water content increases with temperature.

[SleepAndBreathe]

I will try this, thanks for the suggestion.

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Thanks for the information and suggestion!

[Ratchick]

I have mine set to 28C (which is 82.4F) for a humidity setting of 4, and never any rainout, even in humid England's attempt at a summer! I'd definitely look at reducing the humidity setting some, and increasing the tube temperature.