I'm going to try one of these "pollen" filters, the white one, for the first time tonight, along with the grey foam one. I ordered them from my DME and they came without instructions. I was trying to figure out which side should face in or out, so this was helpful, thanks. I have a lot of dust in my...

I am having a similar experience, using a PR System One APAP with A flex and heated humidifier. I was put on the APAP to have efficacy data. About two months of this data resulted in the following three reports: Avg. OA Index - .8 .6 .5 Avg. CA Index - 2.8 3.5 3.3 Avg. Hyp.Index 1.7 2.0 1.9 Avg. RER...