Mouth breathing will cause the machine to use more water. Now that you have switched to a FF mask less water is consumed. THAT. Exactly, so there should be more water available to moisten nostrils, throat and so on. As I said above, the issue is NOT how much water is or is not available. I do NOT r...

My meter is not accurate enough to be "scientific". It just gives me an idea how much water will last the night. In the summer, a half tank is nearly enough. In the winter, I need a full tank to last the night. Unless it rains/snows or doesn't. I fill my humidifier/water tank up to the 'max.' line ...

I purchased a simple humidity meter for two dollars at WalMart. Thanks for this suggestion, but I am not really interested in measuring the humidity 'scientifically'; rather, I just want my nostrils to be moist and to not dry out, and there is such a huge difference between using the F 30 and the D...

The mask would not make a big difference. With the machine on, remove the water tub and feel the heating plate to see if it is hot. Yes, the heating plate is hot. I know the mask *should not* make a difference, but it is the only variable in the whole 'equation' here. Going to 'phone the place I bo...

What is your humidity setting? What is the ambient humidity in your bedroom? Is the water level changing in the water chamber? Have you tried increasing the humidity setting? Humidity is on maximum setting, which is 8. Ambient temp. of my bedroom - not sure, but even in the widely varying seasons w...

Hi, I have been using my Respironics DreamWear Nasal (pillow) mask, and a heated tube, for several years, but switched to the F 30 about two weeks ago because I am a mouth breather. I quite like the F 30, but am getting no humidity at all, to the extent that my nose is very dry, and I wake up severa...