Recommend a bacterial filter?

[OneSnorer]

I read the PR foam issues thread, and the idea of possibly using an inline filter.

- what recommended type and model for the Dreamstation AutoCPAP?
- silly question.. where to install on the machine - with or without the humidify unit?

[upsman]

I saw a video discussion with Philips reps and it was stated that it's not recommended to use these filters. 

AFAIK, it would only stop larger particles that might be released, but wouldn't do anything for the off-gassing of the foam.

[DaveL]

Adding a filter on the Dreamstations discharge will reduce the amount of air delivered. It affects how the fan works.
(memory...fan laws (Mechanical Engineering) )

[Ratchick]

I've seen a couple that go between the mask and end of the hose, that swear that they don't reduce airflow (which seems like that's impossible to me) but they also say not to use with a humidifier. And while it may stop the larger particles, they may not stop smaller particles (depending on the filter and particle size) and probably not gases either (that would definitely affect the airflow).

[mesenteria]

Your best bet, if one exists on the market, is to use a HEPA filter designed for you machine.  I suspect that a bacterial filter, depending on what that means and what you purchase, might be too restrictive.  It will drive your machine's motor to use a lot more amperage to get sufficient airflow past such a filter, running hot as a result, or at least wearing out substantially faster.

[SarcasticDave94]

The inline antibacterial filter would be one that doesn't like humidity.

Certainly you can try this if you want. Make certain to edit your AB filter setting to ON.

A sample images

[jonchalk]

A possible (temporary) solution to the VOCs (off gassing) from Philips devices could be an inline filter that can work safely with humidity, allow for good air flow without compromising the motor, yet stop the VOCs, small particles, and bacteria. That can be easily and affordably replaced frequently.

Does something like this exist?

[Melman]

Most on line suppliers have bacterial filters but a bacterial filter will not remove VOCs, only particulates.

[Big Guy]

Why not something like a whole room air filtering machine? I'd think that would be the way to go. 

Some are pretty elaborate and would of course, have much better filters.

[StratCat48]

Since a standard AB filter is not recommended, I devised my own method removing particulates which allows the humidity water tank and heated hose to still be used. It doesn't remove VOC's and something along the lines of a carbon filter would be needed for that.

Some can likely find flaws in this DIY method of air filtering, but it does not restrict air flow like an AB filter would and it will capture very fine particulates.
http://www.apneaboard.com/forums/Thread-...Water-Tank