Outlet bacteria filters

[Goofproof]

Also the way filters work, the more junk they trap the better they work. Dirty filters trap smaller particals than clean filters, the problem comes from air flow restriction with a dirty filter, starving the air flow. That's why when working on filter systems in the real world, matiance is done by restriction indicators, not hours. Jim

Airflow restriction is a concern, but an additional concern here is whether germs grow on the damp filter surface. If they grow on the upstream side, they might smell and/or restrict air flow. If they grown on the downstream side, they might become airborne and get to the user.

A good reason not to add a uncessary filter in the air circuit, and it one more device to dampen pulses needed for data collection. Jim

[purple]

I have a separate HEPA filter with an Ultraviolet light inside that I bought at Wal Mart. Its air flow is pointed in the general direction of my Sleep Apnea, S9 VPAp from three feet away (to prevent a "Stacked Fan" Problem) and I try to wipe the dust off the bedside table.

"Stacked Fan" would help to cause fans to burn out.

[physicsbob]

I tried these filters a couple of years ago, after one or two days the humidity builds up on them and I wake up in the middle of the night with hardly any air flow through them. I tried alternating days with them to let them dry out but that didn't seem to help much, so I quit using them. still have a half of a case unused and still in their sealed bags.

[khoo kian kok]

Yes the more filtering is better, but to your detriment. This is the hose type, length, is in tune without the filter to process your control/ modulation.
With the filter it is like an illegal damper, therefore your machine is not able to function properly.
Bacteria is a big humbug, may be it filter what is wear and tear of internal machine dropout.