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How hypoallergenic are hypoallergenic filters?
#1
How hypoallergenic are hypoallergenic filters?
I'm Curious.  Call me George and find me a man in a yellow hat.

All of these machines tout "hypoallergenic" filters, but are they really any good at trapping allergens?  I mean really.  If they did, I should be able to put on my CPAP and be relieved of all allergy related discomfort and sinuses clogging up and eyes itching and watering.

Allergens, particularly juniper/cedar are off the fracking charts right now here, in the time of year when they should all be going away.  I scheduled allergy screening this coming week (did that a few weeks back when allergens were relatively low here). I have to be off of all anti-histamines for a good week prior to the test and I am finding these record high levels for the next five days.  Anyway, that's off topic except as a catalyst for the question.

The hypo-allergenic filters - any real evidence they do anything?  I remember the ones for my S8 were little more than a loose fibrous cushion.  The one for my newer machines are nice little tyvek-like paper cushions, but I'll be whipped and dipped in banana pudding if I can tell any difference.  I mean really, how well could they be expected do they keep out pollen or smoke particles or VOCs for folks with sensitivities?
There.  I said it.

OMMOHY
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#2
RE: How hypoallergenic are hypoallergenic filters?
I use an AB filter from the end of my heated hose and connects to the short hose from my mask. When allergy season is really bad that is what I use. You can get them from supplier number 1.
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#3
RE: How hypoallergenic are hypoallergenic filters?
So I assume your answer is "No, the hypoallergenic filters don't work".
There.  I said it.

OMMOHY
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#4
RE: How hypoallergenic are hypoallergenic filters?
The purpose of the standard filter is to protect the machine, not you.
The hypoallergenic filters will catch finer particles. Will they catch all allergenic materials? will duhhh no. The definitely catch more than the standard filter will. In your case, I would use them to minimize your exposure while you are sleeping.
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter 
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#5
RE: How hypoallergenic are hypoallergenic filters?
My reply doesn't address your question but I thought I'd post it anyway.

The hypoallergenic filter is denser than a regular filter making your CPAP work harder to achieve the same pressure and air volume, thus making it louder. When this filter collects pollutants and air flow is further restricted it will cause additional strain on your machine.  Close attention to filter maintenance is recommended when using these type of filters.
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#6
RE: How hypoallergenic are hypoallergenic filters?
(12-15-2018, 08:36 PM)Crimson Nape Wrote: My reply doesn't address your question but I thought I'd post it anyway.

The hypoallergenic filter is denser than a regular filter making your CPAP work harder to achieve the same pressure and air volume, thus making it louder.  When this filter collects pollutants and air flow is further restricted it will cause additional strain on your machine.  Close attention to filter maintenance is recommended when using these type of filters.

I forgot to mention that.   Thanks
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter 
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#7
RE: How hypoallergenic are hypoallergenic filters?
OK I'll admit I don't know the answer as I've not tried the hypoallergenic kind, George. (still working on the guy with a yellow hat) Coffee

I'll concede to bonjour and Crimson Nape on this one. Being denser, I can see the machine working harder and therefore also being louder. But that alone doesn't mean that filter is better. I guess for those that feel they need the hypoallergenic kind, go ahead, but change them more frequently.
Dave

I'm not a doctor in real or fictional life. My posts include opinions based upon user experience and researched info regarding CPAP therapy and should not be considered medically professional directions or advice.


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#8
RE: How hypoallergenic are hypoallergenic filters?
It would help to know the materials and engineering behind the various hypoallergenic filters.  Are they just presenting smaller apertures to the oncoming air which trap smaller particles, and therefor more of them?  Do they have 'sticky' materials which trap some organics?  A mixture?

Whatever the case, by their nature, fitting inside of the same compartment, they will probably 'fill up' faster as mentioned by Crimson Nape, but it depends on what they're trapping, and how much of it.  Another confound that precludes a useful answer. 

If they are aftermarket and present a larger operating surface and volume, they may last considerably longer than the ordinary filters that are inside the compartments.  I haven't seen the one that fits between the mask hose and the machine hose; they may be almost twice as big surface-wise.

Sounds like an opportunity to learn something and to maybe pass it on...??
Serial Tapist
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#9
RE: How hypoallergenic are hypoallergenic filters?
the regular filters catch dust and have this fluffy collection on the outside when fully filled, hypoallergenic ones also catch finer particles inside the filter so they turn black. the regular filters you can remove that fluff. also its not nearly good enough to filter all pollen because a hypoallergenic filter ie HEPA even 100 times the size of our small filters cant catch all of the allergens.
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#10
RE: How hypoallergenic are hypoallergenic filters?
George, read the definition for hypoallergenic.  This is any material that does not contribute significantly to allergies.  It mean nothing in terms of a filter's ability to block allergens.  The term "high efficiency" is another matter.  

Hypoallergenic Defined: Hypoallergenic means that the ingredients/materials used to make/manufacture the product did not cause an allergic reaction in the subjects upon which they were tested.  The hypoallergenic filter is the most egregious use of the term.  Rarely do the materials used to manufacture a filter cause an allergic reaction.  But, the use of the term tricks you into thinking that the filter does more than it really can.  Unless you are allergic to the materials used to make filter media, all filters are hypoallergenic.  That doesn’t mean they do a good job at removing fine particles.  The best allergy filters are sealed-units that use prevent bypass and are HEPA filters.

HEPA filters are rated for efficiency and particle size, i.e. 99.97% of particles with an aerodynamic particle size of 5-microns.
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