Didn't see a thread about this in a quick search, my apologies if it's already been posted about.
When I got my ResMed S9 machine within the last year the salesman gushed about the heated hose "climate tube" feature. It seemed like a weird feature to me because I've never had a problem it would solve, but I guess there's a phenomenon called "rainout" that this feature addresses?
Anyways, soon after I got my machine I discovered that a hole in the tubing was what was causing an annoying whistling sound and so I switched to the unheated tube from my old machine. (I was on the road alot and forgot to call the retailer and ask for a replacement, by now it's probably too late unfortunately, have to wait for whenever my insurance will replace it.)
I've recently discovered that the heated tube feature does something else: it appears to be compensating for a design flaw in the machine. If the machine is filled with water to the proper indicated mark in its water reservoir, (which I hadn't been doing before) in the course of normal operation on a level surface it expels water into the tube, which I have to manually drain because I don't have the heated tube to evaporate it.
tl;dr summary: With an unheated tube the S9 blows water into the tube and it doesn't evaporate very quickly.
I mostly just wanted to get this note up and within Google's view for others considering the S9 or who have the same problem. But I'll ask cpaptalk: anyone had a similar problem? Seems like it might be fixed with a simple right-angle adapter though I haven't tried that yet. Also, any tricks for fixing a pinhole in tubing?
Including these words solely because I think that someone Googling for this kind of problem would search with them (and because honestly it seems a bit sketchy that they get to charge extra - $50 USD total per the invoice - for a heated tube when it probably wouldn't be necessary, for me at least, without the design flaw): fraud scam review bad engineering ClimateLine™ H5i