Resmed Hypoallergenic filter

[OpalRose]

Agree, I personally wouldn't use an AB filter on my machine.  

Now, back to the Hypoallergenic filters.  I notice that one side is rough and one side is soft.  Not that much of a difference by looking, but by feel.

Is there a right way to put in machine?  Softer side out or rougher side out?

Anyone know?

[yankees123]

Hope someone answers that Opal Rose, always wondered that myself!

[SarcasticDave94]

I don't know if this is applicable but I recall soft side out rough in for some PAP I dealt with in the past or it was advising someone to do that. Now oldtimers doesn't let me remember. As for my ASV I don't recall the cheapie foam filter stuff being directional.

[OpalRose]

Received a response from Supplier #1.  They said it didn't matter which side went toward the machine. They did however admit that one side is rougher than the other.  

The RT I talked to at Lincare didn't even notice the difference and told me to just stick it in, it didn't matter.  I think she was annoyed with me.  

[Crimson Nape]

I would speculate that the rougher side would have a higher probability of having loose fibers, thus it should face away from the CPAP intake.  I'm just anal.

[OpalRose]

Well, that makes more sense that the answers I received.

[SarcasticDave94]

Through a bit of unscientific experimentation, it has been determined the FLAT side should face the machine.