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Coronavirus risks associated with N95 cool-flow valves

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Forum topic by TheSnekkerShow posted 04-05-2020 07:24 PM 1638 views 0 times favorited 56 replies Add to Favorites Watch
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TheSnekkerShow

6 posts in 116 days


04-05-2020 07:24 PM

I’m relatively new here (long-time viewer, recent member) and don’t want to break any rules by posting a link to my YouTube channel, so if an admin wants to delete this and post something else as a replacement that’s fine. I just figured a lot of woodworkers have these and should not misunderstand the level of protection they provide. In short, the cool-flow masks have a rubber flap that lets the air from your lungs flow out without being filtered by the N95 mask fabric, so they are inadequate for preventing the airborne transmission of the virus from sick people, and can actually increase risk by providing a false sense of security for those who don’t know.

One of these masks is extremely dangerous
https://youtu.be/QoxXQi4SriM


56 replies so far

View Aj2's profile

Aj2

2951 posts in 2529 days


#1 posted 04-05-2020 08:13 PM

That’s how my P100 filters work inhale through the filter exhale through a small port. I’m not a mask scientist. I do think it’s not pushing air out in the same fashion as a uncovered mouth.
The inside of my mask get pretty wet but at least it can be cleaned because it’s rubber.
So far I haven’t worn mine out in public

Good Luck

-- Aj

View therealSteveN's profile

therealSteveN

5545 posts in 1305 days


#2 posted 04-05-2020 09:00 PM

Please go to

https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html

Please read everything there about “Respirators”

PM me if after doing that you cannot see that a “respirator” marked as N95 doesn’t offer the exact same protection, as any other labeled as N95, or for that matter P100, N100, whatever. All of them will block a particle 0.3 microns in size.

Then please go back to U tube, and post a correction. The news media is doing a fine job as is, spreading misinformation, and causing panic.

Thank you for your attention.

The world….....

-- Think safe, be safe

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TheSnekkerShow

6 posts in 116 days


#3 posted 04-05-2020 09:40 PM

Keep reading the page you linked down to “My N95 respirator has an exhalation valve, is that okay?”, where the CDC confirms the exact point I made in the video:

”...However, respirators with exhalation valves should not be used in situations where a sterile field must be maintained (e.g., during an invasive procedure in an operating or procedure room) because the exhalation valve allows unfiltered exhaled air to escape into the sterile field.”

Now ask yourself this question: If you were in a car, office, grocery store, doctor’s office, or workshop with someone who was infected, and the exhalation flap was reversed so it only opened when you inhaled, would you feel comfortable with that? I’m just explaining something that should be common sense.


Please go to

https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html

Please read everything there about “Respirators”

PM me if after doing that you cannot see that a “respirator” marked as N95 doesn t offer the exact same protection, as any other labeled as N95, or for that matter P100, N100, whatever. All of them will block a particle 0.3 microns in size.

Then please go back to U tube, and post a correction. The news media is doing a fine job as is, spreading misinformation, and causing panic.

Thank you for your attention.

The world….....

- therealSteveN


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ibewjon

1514 posts in 3524 days


#4 posted 04-05-2020 10:55 PM

Respirators with the exhalation valve are not going to filter exhaled air. A person that has corona or other illness should NOT use a mask with a valve, it will spread the disease. Only the inhaled air is filtered. Yes, the INCOMING air is filtered to the same level, but NOT the exhaled air.

View unclearthur's profile

unclearthur

351 posts in 2519 days


#5 posted 04-06-2020 12:29 AM



Respirators with the exhalation valve are not going to filter exhaled air. A person that has corona or other illness should NOT use a mask with a valve, it will spread the disease. Only the inhaled air is filtered. Yes, the INCOMING air is filtered to the same level, but NOT the exhaled air.

- ibewjon

That seems right. If your purpose is to stop breathing in the virus, the valved mask is OK. If your purpose is to filter the air you are exhaling (to protect others, because you may be sick), then the valve is not OK.

View therealSteveN's profile

therealSteveN

5545 posts in 1305 days


#6 posted 04-06-2020 05:01 AM

I’ve only seen respirators being used by people not wanting to get the virus. People who are ill, need all the O2 they can get, if they aren’t intubated already. Any mask, respirator, or even a towel wrapped around your head is going to increase your difficulty in breathing.

” because the exhalation valve allows unfiltered exhaled air to escape into the sterile field.”

You probably should do some research on what a “sterile field” is, and when one would be working with one. It has absolutely no connection to a person wearing a respirator to keep from getting a virus.

Also look at the projections of the ARC a cough makes, and this might explain to you why they are suggesting 6 to 8 feet of space between people. Even Olympic level athletes cannot cough a straight line for more than around 2 feet, and none of them could make it dip, and then go upward to go into the vent of the respirator you don’t like.

I think the only way that mask could be risky is if you wore it, and did handstands. I pretty much think if you are wearing a mask to keep from getting ill, handstands aren’t on the list of things you want to be doing.

-- Think safe, be safe

View therealSteveN's profile

therealSteveN

5545 posts in 1305 days


#7 posted 04-06-2020 05:03 AM


A person that has corona or other illness should NOT use a mask
- ibewjon

That part is absolutely correct.

-- Think safe, be safe

View Kelly's profile (online now)

Kelly

2936 posts in 3675 days


#8 posted 04-06-2020 05:34 AM

Thanks for that reminder.

View tvrgeek's profile

tvrgeek

941 posts in 2380 days


#9 posted 04-06-2020 09:56 AM

I believe this is ABSOLUTELY INCORRECT. The reason advising everyone to wear a mask is the majority of carriers have no symptoms and do not know they have and can spread the virus. The mask greatly reduces the possibility they will spread the virus. I do not know the recommendation for those who are really sick at home or hospital.

Reducing your possible exposure is secondary and not very effective. You wear a mask to protect OTHERS. Wearing one to protect yourself is largely ineffective unless it is a full sealed face mask with powered forced air. If you have a cough, you have no business leaving your house for any reason. Period.

The vent on a mask can be blocked with a bit of tape. Unless you are exercising, you will have plenty of flow without it.

.

A person that has corona or other illness should NOT use a mask
- ibewjon

That part is absolutely correct.

- therealSteveN


View wildwoodbybrianjohns's profile

wildwoodbybrianjohns

1446 posts in 278 days


#10 posted 04-06-2020 10:06 AM

Adding to tvrgeek ´s comments. In Czech republic it was their approach that everyone in the entire country wear a mask, not to protect themselves individually, but the reverse; and they began very early on. This approach has led to that country having the lowest(I think) infection rate in Europe, and maybe worldwide. Of course, they also locked down the border early on as well, so that was also a factor.

I was also gonna suggest that the exhaust valve could be glued with some locktite, but tvrgeek ´s tape idea is good too.

-- Wildwood by Brian Johns: Because cheese isnt a healthy source of cheese, I will use grated cucumber to top off this raw food vegan pizza.

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ibewjon

1514 posts in 3524 days


#11 posted 04-06-2020 02:07 PM

I was not quoted completely in post 7. It should say ” not wear a mask with the exhalation valve if a person is sick ”. The problem I see on tv so often is people do not wear a mask correctly. Nose uncovered, metal strip not formed to face for a better seal, only one strap in use, and many other issues. For my job, I was mask and respirator fit many times, with training how to wear them. At a chemical or nuclear plant, you have to wear correctly, or be breathing chemicals or radioactive particles into your lungs.

View therealSteveN's profile

therealSteveN

5545 posts in 1305 days


#12 posted 04-06-2020 05:26 PM

I am the guy licensed, and certified to do the fitting. So I’ll stick to my answers.

-- Think safe, be safe

View ibewjon's profile

ibewjon

1514 posts in 3524 days


#13 posted 04-06-2020 05:58 PM

Many people have a mild case and spread the virus before becoming ill enough for the hospital and oxygen. That is how this is spreading. And people who still believe it is a hoax. Now some preachers are saying a mask is a Muslim plot to take over the country. And the goofy churches that are packing religious services to help spread the virus as an Easter gift are not helping either.

View Aj2's profile

Aj2

2951 posts in 2529 days


#14 posted 04-06-2020 06:22 PM



I am the guy licensed, and certified to do the fitting. So I ll stick to my answers.

- therealSteveN


Steve what’s your opinion on Sebo vacuum cleaner bags. I have a home made mask and I’m adding a layer of a sebo filter bag. My uneducated view is it’s alot like a filter mask.
I rather not open my p100 organic filter and wear to the grocery.
Thanks

-- Aj

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wildwoodbybrianjohns

1446 posts in 278 days


#15 posted 04-06-2020 07:34 PM


Many people have a mild case and spread the virus before becoming ill enough for the hospital and oxygen. That is how this is spreading. And people who still believe it is a hoax. Now some preachers are saying a mask is a Muslim plot to take over the country. And the goofy churches that are packing religious services to help spread the virus as an Easter gift are not helping either.

- ibewjon

This is sorta funny. Here, we have many migrant workers from Morocco, and they were the first to be wearing masks, and there were more of them on average wearing masks than Spaniards. Now, it is about even, around 40% of everyone.

-- Wildwood by Brian Johns: Because cheese isnt a healthy source of cheese, I will use grated cucumber to top off this raw food vegan pizza.

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