Johnny, You inspired me years ago when you first came out with your Wii-mote hacks. Then you moved on to do some incredible work at google. Glad to see you posting again and helping the community! Keep up the good work! :)
I work both in the Emergency Department and the ICU - Thank you for taking the time to do this project and post. It means a lot to see to see that you cared enough to put in so much effort to help.
Johny :) we really missed you as a maker community , you were such an inspiration to all of us since your first videos about Wii mote and how you turned up inventing the kinect Xbox later. I really enjoyed seeing you step in as an inventor to participate in solving this world crisis. We would love to see more on you-tube as constant you-tuber with your great invention projects
👏 wow! I wish I knew someone that was good at building these. I'll have to look around. As a immune compromised patient along with my daughter, this would let me out of the house long enough to still breathe but yet be protected. I'm so impressed!
Thank you. Many more people will get through this uninfected because of folks like you that are providing this kind of information that will save lives!
wow it's really you!!! You were the dude made the IR Nintendo wii tracker. I made an IR white board many many many years ago from your video. you are still innovating!!!
Awesome. Years ago I saw your TED talk about making a semi-smart board from a Wi and some IR LEDs. Myself and student built one...worked well. As soon as realized you posted this I knew it was going to be good.
Thank you, Johnny. I was looking at exactly the same idea. This is exactly what I was looking at to do. I was thinking of it as a class project. I have 3D printers and some amazing students. Keep on be inspirational!!
Johnny - I recommend wrapping the joint with self-vulcanizing tape instead of electrical tape (or add the electrical tape on top of the self-vulcanizing tape). I use the SVT to repair electrical automotive connections with brittle connectors or cracking/splitting insulation. SVT creates an air tight and water tight seal. Fun to work with as it kind of melds into itself but is NOT sticky.
Great idea Johnny, keep up the good work. Your earlier video got me to think about how I could use my CPAP mask as a protective mask in public. One of the problems with the N95, and surgical masks is that they are pretty flimsy and air can get in from the sides of the mask. The other big problem for me is the exhaust fogs my glasses, or any eye protective gear. So in public I wear my CPAP mask, with the hose attached. At the end of the hose, I have double kleenix tissues,wrapped around the hose with an elastic. The tissues I believe are finer than the N95 mask. The mask is 100% effective for not allowing outside air according to my cpap machine - it provides a great seal over my nose and mouth. On the front of the mask are two small holes for exhaust, however I cover them up with tape, so I am only breathing air from the end of the tube. So I taking air in, and exhausting from the end of the tube. Granted there is no pressure, pushing air up or out, and I may be breathing some of my own exhaust, but I think it's fine for a quick trip to the grocery store.
I applaud the effort and may be there is a lot that industry can learn about stripped back RPE products. Comments / words of caution - 1) making PAPR is a serious undertaking and manufacturers are doing everything they can to make as many as possible as quickly as possible in the current situation, 2) consider the risks of what happens if the device fails / doesn't work but the wearer thinks they are protected, 3) there are many design and manufacturing considerations - some mentionned in the comments below: robustness, battery alarm, flow alarm, CO2 build up, tight-fitting masks need to be fit tested (even posititve pressure ones) in many countries, to name a few.
Excellent points. I think a loose-fitting design is a much better idea for this application--that would address some of your concerns. A plastic bag secured *loosely* around the neck might do the trick, and that will protect the eyes as well.
This is awesome! I’m a glassblower. And sometimes the intense heat that comes from the flame and the fumes from the gasses, make me close to passing out. With molten glass in my hand. it could be deadly. I’ve been so paranoid about passing out while working. Gonna make one immediately
I found this while searching for PAPR equipment for welding, which has become a very costly option for health conscious weldors. Some great alternate ideas have come out of this for making an alternative to my currently used static 3M 6502QL respirator.
I don't even know how I'm already subscribed to your channel but I was looking into building my own PAPR for welding fumes I occasionally encounter at work.
I have been building these since 1996. For painting and prep, exteriors. I gave up on the battery idea, and decided to just plug in. I also used a hair dryer motor and 16 volt power supply. I did use a back pack. I am happy with any hepa, high efficiency filter. Mine used window tint film, as we are working 98 F days, sanding for 12 hours. I estimated my cost to be around $150 for everything, back in 1996. Plus the time. ... The 1993 papr firefighting used were junk in my book, as far as power, heat , and ability to breath...Oh, and I did add a gfci and 1 amp circuit breaker.
Johnny - Wondering about folk's thoughts on collecting a set of engineers/makers who would be willing to acquire parts, fabricate, and donate the working machines to our medical centers for staff. I'm thinking that making even 15k-20k of these could be pretty impactful and if we do it before the ED MDs and RNs all get sick it would be advantageous. I'm happy to help either with collecting volunteers or marketing if helpful.
Check Mhub in Illinois, they are part of a group of business and manufacturing incubators that are working on this, they have tons of smart people working on this. You can join if you have knowledge.
Johnny, great job, thanks for sharing. I think it's preferable to put the filter downstream of the blower, so that you don't have to cover the blower with electrical tape and hope that it blocks unfiltered air from getting through. I'm not sure about the blower you're using, but there are some blowers with air-bearings that count on a certain amount of air recirculation through the housing to function and cool. Also, putting the filter upstream of the blower makes for a lower gage pressure in the housing that tends to drive leakage of unfiltered air into the system. Thanks again.
This could be well timed and inspirational! Can we get Clay Bavor to take it over and take responsibility for delivering it? Also, I'd suggest not alienating anyone that has expertise in this domain. I can't stress enough the value of external expertise where the outcome is so important.
Great work Johnny. I've been working on a PAPR too, still waiting for parts to arrive. DC blower powered by 20V li-ion drill battery. LM2596 buck converter for variable voltage/blower speed. Vacuum cleaner HEPA filter in a box. Blower mounted to other side of box. All sealed with EPDM window seal strip (gasket) and maybe Aquarium silicone sealant (non-toxic). Air supply pipe connected to blower outlet is 1 inch clear PVC (wide and smooth pipe for lower air resistance) Edit: think a proper air hose would be better, the PVC isn't ideal. For the head part I was thinking about a whole hood based on a head-mounted polycarbonate face shield with added plastic bags. Sealed loosely around the neck. These designs work by having positive air pressure and allowing small leaks so it all depends on getting enough air out of the blower. The unknown for me so far is how much my vac cleaner HEPA filter will drop the airflow. I have seen a figure of 300 Pascals or 1 inch water pressure. I might need a more powerful blower or a bigger box with two or more filters in. Tight fitting PAPR needs about 115 litres/min, loose fitting needs 160/170 litres/min. About 6 cubic feet. These blowers spec at a lot more than that (30 plus cfm) but that's with no pressure drop from a filter, need to look at the Static Pressure vs Air Flow graph on the blower spec sheet. Check out 3M Versaflo, Scott Proflow/Duraflow commercial ones. Head-wearable ones for woodworking etc are Trend Airshield and JSP Powercap.Think about battery life too. With a 2 or 4AH battery they should run for a good few hours. The commercial ones are designed to run all day.
The air box can mount on a belt or strap. Battery in a jacket pocket. A whole head hood is much better for comfort wearing glasses. Just seen the snorkel PAPR vid ua-cam.com/video/lmNIEDDCqSk/v-deo.html Air compressor rather than a blower there. Edit: Ah no, it's a tiny blower.
CBRN filters are not virus filters. They do not adequately stop things as small at Covid19 from getting though. You are going to need a P3 filter or some variant. Even adding a good quality HEPA insert would help you out a bit.
I like your design. If the user breaths in more air than the blower is supplying, non-filtered air will enter through: 1. The hose to mask elbow adapter. There is a one way safety valve/flap that let's air in if the CPAP machine's blower is not working. This flap is closed by the CPAP pressure. But if the user inhales too hard, the valve will also open letting in contaminated air. 2. The mask's tiny exhalation holes around the elbow connector. Other mask's, etc will probably have the same two issues. Exhalation holes and safety valve/flap/etc.
the filter big military filter should last 24 hours and the pink p -100 filter in industrial use lasts 8 hours, i see no reason it would not last at least 16 hours. thats if you have a regular replacement schedule. you can also use to failure but thats unsafe. p-100 mask filter down to .05 micron. virus particle is 2x smaller than that size so protection of cartridge is not ideal. be well. NCCER Safety Technician/ ret. emt. be well.
@@safetyfirstintexas According to my informations if you are talking about sars-cov-2 virus the average size is 0.125 micron so the p100 filter (down to .05 micron) should be sufficient. thanks.
With the face shield, you don't need the goggles. Great idea overall as PPE is what is in short supply rn, not vents. Modern vents can (with modification) ventilate up to 4 people for every 1 vent. I hope it doesn't come to this in the US but it has been used here in mass cas events in the past.
Putting more than one patient on a vent will be a logistical nightmare that would create more problems than it solves. It can be done, but “the juice isn’t worth the squeeze.”
Turns out you were wrong to dictate "With the face shield, you don't need the goggles"; Sealed eye protection of some type WAS and IS STILL ACTUALLY NEEDED.
We contacted Phillips Espanya (spain) .. and asked for help with ANY of the CPAP equipment they have... so we could start testing.. they said they had NO STOCK in Spain ?!?!?!?! .. so we went online and bought some CPAP masks from RESMED ..
I have all the components for building this, but I’m struggling with wiring it. Could you please make a video that shows how to wire it step by step? This would be an amazing resource to have in my community, as we only have two ventilators for thousands of people (I live in a rural, desert area). Thanks so much!
Silicon tape = YES. But duct tape is fine if you tape inside and out. What matters is getting to a HAZMAT hood and best a whole suit. Blowing filtered air into the suit keeps it from over heating.
you might want to use the decathlon full face scuba mask. also as this is run by an arduino, you could make the arduino increase the air flow rate by connecting a heart beat sensor to it
Thanks for the new invention. I think you are on to another great work. Are there a supply of small brushless dc motors that produce the same air flow that are not so expensive as the ventalator motors
Nice work, just a heads up CBRN filters have activated charcoal in them so once they are open they start to go bad... fast. You only get 6-10 hours of use with one and they can only be left open for a few weeks before they go bad. I would recommend a 40mm viral filter like what MIRIA safery has on their website with an ULPA filter media
Our state, NC, is bottle necked in testing because of lacking PPE. These diy PAPRs need to be in deployment today. An air tight respirator is a a very difficult design target... but positive pressure air supply like these are very forgiving... YOU DON'T NEED TO CREATE A PERFECT AIR TIGHT SEAL WITH A PAPR. We have power everywhere and tons of small fans. Do PAPRs now.
I am surprised at how many of these already exist. I am also amazed at how expensive they are! I envisioned a thin wide shell that you would wear on your back like a pack that was molded and padded for comfort. It would have a large HEPA filter to decrease filtration effort. I would divide the flow so that one tube supplied air and the other passed it out through a HEPA filter as well. This would be done using common valves at the entrance of each tube to the face mask. One tube would pass over each shoulder and connect at the top of the mask. I was wondering if using an existing power supply would be less expensive, such as common drill and other power tool batteries. A common face shield could be worn if needed. I would like it to be compatible with ozone generating cleaners such as So-Clean. Perhaps a sealable cover over the filters would allow this with some cleaver tubing arrangement.
Great idea as I was thinking of trying to do the same to an older cpap machine I have, but mine runs on 110v. I know it has positive pressure on the mask at all times and it vents out through the exhalation valve to help you exhale better just like scba the fire service uses. If you could find an MSA scba mask it has the twist turn lock for the regulator to connect to the mask and a hepa or n95 canisters that are a direct fit for checking the seal of the mask. I used one these in the fire service and it would look funny at the grocery store but you'll have full-face protection. Good luck.
Awesome Johnny. Question there are millions of AC blow up matress pumps out there. What about them as a blower and mechanically limiting flow on exit nozzle. Test each diameter for output cfm. Then possibly the only required additional manufactured part is a speed /intermittent controller with flow sensor alarm? Would this work and be more potentially available id love to chat with you on the phone and discuss
Someone in the project has been trying it out: github.com/jcl5m1/ventilator/issues/62 The biggest issue is that cpaps are designed to work for many hours at a time. And a typical mattress pump may not be rated for that. So each pump may need to be tested to see how long they can run for.
A tyvek hood with a built in face shield with the hose connection feeding in air would make this a standard style papr... that would also protect from drafts carrying viral material since the purified air will constantly flow down your neck and out.
Thank you great idea, A used komplett CPAP Machine I can get around for 300 euro plus/ minus . But I didnt know how a to put a bipap cycle on it. With a small ventil You can get even go to controlled ventilation I suppose. . And with a oxygenconzentrator ( up to 6 l /min) somewhere attached to the system , oxygenconcentration up to 50% in the aire the patient is getting.
I hope you get these into the hands of the wider public. Far, far, far, better for filtering out viral microparticles than cloth and paper filters #MasksAgainstCoronavirus
Professional level air pump will set you back $40. Get a 12 volt and (buy 3 of them) rechargeable batteries/charger are inexpensive. The 40 mm NATO P100 is your best choice but 3M painter mask filters are easy to replace and to decon daily with UV light. For adapters you can go to PVC plumbing fittings. Plastic hose is cheap. Instead of half-face or full-face masks you get better comfort ratings combining a HAZMAT hood -- back side air duct -- with a simple face shield. Duct Tape makes a perfectly good, durable seal.
I think the filter and motor unit need to be in open air not a back pack, maybe a belt or harness. Keeping it in a closed environment will strain the motor and back pack material could be blocking airflow through the filter
Hospitals are very different environment; they constantly having physical contact contaminated surfaces and air spaces, and moving from many different potential sources in the course of a day. They have layers of ppe that have to be removed after being exposed to a to multiple infected surfaces and people for hours day after day; it's a much more complex matrix of potential exposure compared to what most of us experience. In a non-medical setting in which an average person needs to run crucial errands perhaps once a week; their protective gear can be removed and stored for several days to kill the virus and as long as they are washing their hands immediately, there shouldn't be any transfer. If being especially cautious one could remove "outside" clothing and store it with their protective gear.
not even joking, you could probably seal that tape more with flex seal type spray. it would essentially put an airtight hardened case around your tape work.
This is great info! I am hoping to use this information for another purpose, I would like to build a face shield using an older firefighting face shield with positive air pressure for woodworking so I don't inhale the find sawdust particles. Do you have or know of any videos that show step by step how to hook up a blower motor like the one you had to a battery? I think that's the next step I will have to learn.
Commercial PAPR systems are crazy expensive. The 3M system is excellent, but is about 2 grand. A couple small companies have made lower cost power visors. I had one made by RACAL and there is a small british company called Trend that makes a simple one for $400. If you can come up with something cheap for woodworkers, you could probably have a lot of supporters on kickstarter.
This one actually has potential! Hospitals do have a significant need for Papr's ? how long does the battery last? and couldn't you 3d print a housing for the blower, then Use gasket and screws, Tape doesn't seem like a very long term solution, or even a very durable solution.
Put a cutup raincoat airtight around that faceshield.. rivet and glue it airtight.. no need for reapirator and goggles then.. also add UV Tube into airflow After Filter for added protection.. you can use These only P3R Filters for cheaper build..
We just made a PAPR. Not perfect. Used a small shop vac, clear trash bag, duct tape, and a fliter on the suction side. Cut about a 1 inch hole in the top of trash bag. Duct tape hose and bag around neck. Turn it on and the bag blows up. Please note that I used a corded shop vac. Best with a shop vac that uses recharge batteries.
I tried to do something like this. Unfortunately, it is impossible to find filters as an individual. I called up a couple. I called up a few domestic manufacturers and explained what I was tryign to do. No good "We are only providing to health care right now" :
ICU nurse here. This idea is awesome, and I agree - this would have more impact in the long run than homemade ventilators. My concern is that we will run out of available CPAP machines like we are running out of ventilators, since both are in use for COVID patients. Do you have alternative ideas to using CPAP parts?
Better not to use the CPAP for Covid19 Patients as ventilator alternatives. The plus side is it free's up CPAPs for projects like these (for caregivers). www.npr.org/sections/health-shots/2020/03/27/822211604/cpap-machines-were-seen-as-ventilator-alternatives-but-could-spread-covid-19
although the restriction would be great a hepa filter off a vacuume cleaner would probably work also. and may stand cleaning with bleach solution of 1.5%. be well
It's a nice upgrade from a filter mask and I think it's really helpfull for doctors in the field or taking care of someone infected in your house, but I think that pitching it for the general public as a protection upgrade for every day use would worsen the shortage of available filters for the former, even more if you take into account the shortened life span of the filters because of constant air flow. Maybe you can test the effectivness of diy filters, I have seen some examples from other youtubers that use diferent combination of household items, from toilet paper to actual rolls of certified filter cloth. Sorry for my grammar, this Is coming from a chilean.
See Johnny's reply below: "Full face gas masks can be somewhat laborious to breathe through. So, the pump makes it easier to breathe and less weight on the face."
Ok , how about this ; a car windshield wiper switch set to intermittent, to a car blower motor , to a tube to a mask ? You could hook it to a 12 volt converter or a 120 volt converter ?
Good job Mister. I wanna ask you where i could buy the blower and the battery power like that? Maybe this question will not red. But yeah it's my try. Thank you sir. God bless you. 👍
If you could somehow 'seal' the edges of the clear shield to your head (foam, cloth, etc., quality of seal would be inversely related to amount of overpressure available) and the blower supplies air to keep the space in front of your face positive pressure relative to the outside, wouldn't that obviate the need for the mask and goggles then?
Yes. I was just in the hospital for pneumonia and their papr gear has a cloth like material around the shield and they needed no protective eye gear because the shield was effective. The only ones who needed extra protection were those with coughs or cold like symptoms to keep their patients safe.
Johnny, you are absolutely the king of making low cost equipment with high impact. I'm glad to see you posting and your work again :)
Ya but it's too bad he couldn't make something useful.
Johnny, You inspired me years ago when you first came out with your Wii-mote hacks. Then you moved on to do some incredible work at google. Glad to see you posting again and helping the community! Keep up the good work! :)
I know! Before he had any grey hairs! Really interesting designer.
I work both in the Emergency Department and the ICU - Thank you for taking the time to do this project and post. It means a lot to see to see that you cared enough to put in so much effort to help.
Johny :) we really missed you as a maker community , you were such an inspiration to all of us since your first videos about Wii mote and how you turned up inventing the kinect Xbox later. I really enjoyed seeing you step in as an inventor to participate in solving this world crisis. We would love to see more on you-tube as constant you-tuber with your great invention projects
👏 wow! I wish I knew someone that was good at building these. I'll have to look around. As a immune compromised patient along with my daughter, this would let me out of the house long enough to still breathe but yet be protected. I'm so impressed!
Thank you. Many more people will get through this uninfected because of folks like you that are providing this kind of information that will save lives!
wow it's really you!!! You were the dude made the IR Nintendo wii tracker. I made an IR white board many many many years ago from your video. you are still innovating!!!
Awesome. Years ago I saw your TED talk about making a semi-smart board from a Wi and some IR LEDs. Myself and student built one...worked well. As soon as realized you posted this I knew it was going to be good.
Thank you, Johnny. I was looking at exactly the same idea. This is exactly what I was looking at to do. I was thinking of it as a class project. I have 3D printers and some amazing students. Keep on be inspirational!!
Awesome work!! You’re the maker we need but don’t deserve!! Bless you man.
Johnny - I recommend wrapping the joint with self-vulcanizing tape instead of electrical tape (or add the electrical tape on top of the self-vulcanizing tape). I use the SVT to repair electrical automotive connections with brittle connectors or cracking/splitting insulation. SVT creates an air tight and water tight seal. Fun to work with as it kind of melds into itself but is NOT sticky.
Great idea Johnny, keep up the good work. Your earlier video got me to think about how I could use my CPAP mask as a protective mask in public. One of the problems with the N95, and surgical masks is that they are pretty flimsy and air can get in from the sides of the mask. The other big problem for me is the exhaust fogs my glasses, or any eye protective gear.
So in public I wear my CPAP mask, with the hose attached. At the end of the hose, I have double kleenix tissues,wrapped around the hose with an elastic. The tissues I believe are finer than the N95 mask. The mask is 100% effective for not allowing outside air according to my cpap machine - it provides a great seal over my nose and mouth. On the front of the mask are two small holes for exhaust, however I cover them up with tape, so I am only breathing air from the end of the tube. So I taking air in, and exhausting from the end of the tube. Granted there is no pressure, pushing air up or out, and I may be breathing some of my own exhaust, but I think it's fine for a quick trip to the grocery store.
Lots of dead pace in your design. Your probably rebreathing quite a bit of CO2.
Johnny Lee, You are a really great guy and a major contributor to the well being of society!
Just wearing a cloth face mask does more for society than making a makeshift PAPR
I applaud the effort and may be there is a lot that industry can learn about stripped back RPE products. Comments / words of caution - 1) making PAPR is a serious undertaking and manufacturers are doing everything they can to make as many as possible as quickly as possible in the current situation, 2) consider the risks of what happens if the device fails / doesn't work but the wearer thinks they are protected, 3) there are many design and manufacturing considerations - some mentionned in the comments below: robustness, battery alarm, flow alarm, CO2 build up, tight-fitting masks need to be fit tested (even posititve pressure ones) in many countries, to name a few.
Excellent points. I think a loose-fitting design is a much better idea for this application--that would address some of your concerns. A plastic bag secured *loosely* around the neck might do the trick, and that will protect the eyes as well.
This is awesome! I’m a glassblower. And sometimes the intense heat that comes from the flame and the fumes from the gasses, make me close to passing out. With molten glass in my hand. it could be deadly. I’ve been so paranoid about passing out while working. Gonna make one immediately
This man is a legend,im subscribing
I found this while searching for PAPR equipment for welding, which has become a very costly option for health conscious weldors. Some great alternate ideas have come out of this for making an alternative to my currently used static 3M 6502QL respirator.
great followup video! I hope this goes viral
This is amazing. Thanks Johnny. Just have to figure out how to get the supplies.
Did you find out where to get the pump?
You are a hero. Hopefully this gets done.
I don't even know how I'm already subscribed to your channel but I was looking into building my own PAPR for welding fumes I occasionally encounter at work.
I have been building these since 1996. For painting and prep, exteriors. I gave up on the battery idea, and decided to just plug in. I also used a hair dryer motor and 16 volt power supply. I did use a back pack. I am happy with any hepa, high efficiency filter. Mine used window tint film, as we are working 98 F days, sanding for 12 hours. I estimated my cost to be around $150 for everything, back in 1996. Plus the time. ... The 1993 papr firefighting used were junk in my book, as far as power, heat , and ability to breath...Oh, and I did add a gfci and 1 amp circuit breaker.
You are back... Awesome
Great to see ya again. thank you!
Excellent idea buddy. Hospitals will collapse have done so. This gives a few more people a chance at home.
Johnny - Wondering about folk's thoughts on collecting a set of engineers/makers who would be willing to acquire parts, fabricate, and donate the working machines to our medical centers for staff. I'm thinking that making even 15k-20k of these could be pretty impactful and if we do it before the ED MDs and RNs all get sick it would be advantageous.
I'm happy to help either with collecting volunteers or marketing if helpful.
Check Mhub in Illinois, they are part of a group of business and manufacturing incubators that are working on this, they have tons of smart people working on this. You can join if you have knowledge.
Johnny, great job, thanks for sharing. I think it's preferable to put the filter downstream of the blower, so that you don't have to cover the blower with electrical tape and hope that it blocks unfiltered air from getting through. I'm not sure about the blower you're using, but there are some blowers with air-bearings that count on a certain amount of air recirculation through the housing to function and cool. Also, putting the filter upstream of the blower makes for a lower gage pressure in the housing that tends to drive leakage of unfiltered air into the system. Thanks again.
This could be well timed and inspirational!
Can we get Clay Bavor to take it over and take responsibility for delivering it?
Also, I'd suggest not alienating anyone that has expertise in this domain.
I can't stress enough the value of external expertise where the outcome is so important.
Perspective can be lost when day after day you do the same thing. A fresh look should not be disparaged.
Great work Johnny. I've been working on a PAPR too, still waiting for parts to arrive. DC blower powered by 20V li-ion drill battery. LM2596 buck converter for variable voltage/blower speed. Vacuum cleaner HEPA filter in a box. Blower mounted to other side of box. All sealed with EPDM window seal strip (gasket) and maybe Aquarium silicone sealant (non-toxic). Air supply pipe connected to blower outlet is 1 inch clear PVC (wide and smooth pipe for lower air resistance) Edit: think a proper air hose would be better, the PVC isn't ideal.
For the head part I was thinking about a whole hood based on a head-mounted polycarbonate face shield with added plastic bags. Sealed loosely around the neck. These designs work by having positive air pressure and allowing small leaks so it all depends on getting enough air out of the blower. The unknown for me so far is how much my vac cleaner HEPA filter will drop the airflow. I have seen a figure of 300 Pascals or 1 inch water pressure. I might need a more powerful blower or a bigger box with two or more filters in. Tight fitting PAPR needs about 115 litres/min, loose fitting needs 160/170 litres/min. About 6 cubic feet. These blowers spec at a lot more than that (30 plus cfm) but that's with no pressure drop from a filter, need to look at the Static Pressure vs Air Flow graph on the blower spec sheet.
Check out 3M Versaflo, Scott Proflow/Duraflow commercial ones. Head-wearable ones for woodworking etc are Trend Airshield and JSP Powercap.Think about battery life too. With a 2 or 4AH battery they should run for a good few hours. The commercial ones are designed to run all day.
The air box can mount on a belt or strap. Battery in a jacket pocket. A whole head hood is much better for comfort wearing glasses. Just seen the snorkel PAPR vid ua-cam.com/video/lmNIEDDCqSk/v-deo.html Air compressor rather than a blower there. Edit: Ah no, it's a tiny blower.
CBRN filters are not virus filters. They do not adequately stop things as small at Covid19 from getting though. You are going to need a P3 filter or some variant. Even adding a good quality HEPA insert would help you out a bit.
it is a shame that the only consumable part of this is so darn expensive, but there is no way around it that is safe and easy. nice vid
Good luck getting those parts!
Order anything CPAP it's a wait up into middle of May .
Someone that is actually helping.
I like your design.
If the user breaths in more air than the blower is supplying, non-filtered air will enter through:
1. The hose to mask elbow adapter. There is a one way safety valve/flap that let's air in if the CPAP machine's blower is not working. This flap is closed by the CPAP pressure. But if the user inhales too hard, the valve will also open letting in contaminated air.
2. The mask's tiny exhalation holes around the elbow connector.
Other mask's, etc will probably have the same two issues. Exhalation holes and safety valve/flap/etc.
How many times can I use this ? I am a doctor in Egypt and we have an acute shortage in protective equipment when we intubate patients.
the filter big military filter should last 24 hours and the pink p -100 filter in industrial use lasts 8 hours,
i see no reason it would not last at least 16 hours.
thats if you have a regular replacement schedule.
you can also use to failure but thats unsafe.
p-100 mask filter down to .05 micron. virus particle is 2x smaller than that size so protection of cartridge is not ideal. be well.
NCCER Safety Technician/ ret. emt.
be well.
@@safetyfirstintexas According to my informations if you are talking about sars-cov-2 virus the average size is 0.125 micron so the p100 filter (down to .05 micron) should be sufficient. thanks.
@@marcellopenta never rely on average size when filtering viruses. go for least particle size outliers as indicator of performance.
Great 👍 and timely information Mr Johnny! Kudos brother!
With the face shield, you don't need the goggles. Great idea overall as PPE is what is in short supply rn, not vents. Modern vents can (with modification) ventilate up to 4 people for every 1 vent. I hope it doesn't come to this in the US but it has been used here in mass cas events in the past.
Putting more than one patient on a vent will be a logistical nightmare that would create more problems than it solves. It can be done, but “the juice isn’t worth the squeeze.”
Turns out you were wrong to dictate "With the face shield, you don't need the goggles"; Sealed eye protection of some type WAS and IS STILL ACTUALLY NEEDED.
Thank you for your insightful, creative, thinking out of the box designs.
Super! Well done! And we use part of the reverse osmosis cartridge together with ultra-violet diodes in the range of 250-280 nm
They even make full face CPAP masks that cover your eyes too. That would be even better.
Great work mate.. keep helping people of world 👍👍
We contacted Phillips Espanya (spain) .. and asked for help with ANY of the CPAP equipment they have... so we could start testing.. they said they had NO STOCK in Spain ?!?!?!?! .. so we went online and bought some CPAP masks from RESMED ..
Thank god we have you
I have all the components for building this, but I’m struggling with wiring it. Could you please make a video that shows how to wire it step by step? This would be an amazing resource to have in my community, as we only have two ventilators for thousands of people (I live in a rural, desert area). Thanks so much!
where did you buy them?
Instead of electrical tape, you might consider using self fusing silicone tape (e.g. Rust-oleum or Nitto).
Silicon tape = YES. But duct tape is fine if you tape inside and out. What matters is getting to a HAZMAT hood and best a whole suit. Blowing filtered air into the suit keeps it from over heating.
you might want to use the decathlon full face scuba mask. also as this is run by an arduino, you could make the arduino increase the air flow rate by connecting a heart beat sensor to it
Just found you, and am subscribing. Great work!
Thanks for the new invention. I think you are on to another great work. Are there a supply of small brushless dc motors that produce the same air flow that are not so expensive as the ventalator motors
Nice work, just a heads up CBRN filters have activated charcoal in them so once they are open they start to go bad... fast. You only get 6-10 hours of use with one and they can only be left open for a few weeks before they go bad. I would recommend a 40mm viral filter like what MIRIA safery has on their website with an ULPA filter media
Our state, NC, is bottle necked in testing because of lacking PPE. These diy PAPRs need to be in deployment today. An air tight respirator is a a very difficult design target... but positive pressure air supply like these are very forgiving... YOU DON'T NEED TO CREATE A PERFECT AIR TIGHT SEAL WITH A PAPR. We have power everywhere and tons of small fans. Do PAPRs now.
I am surprised at how many of these already exist. I am also amazed at how expensive they are! I envisioned a thin wide shell that you would wear on your back like a pack that was molded and padded for comfort. It would have a large HEPA filter to decrease filtration effort. I would divide the flow so that one tube supplied air and the other passed it out through a HEPA filter as well. This would be done using common valves at the entrance of each tube to the face mask. One tube would pass over each shoulder and connect at the top of the mask.
I was wondering if using an existing power supply would be less expensive, such as common drill and other power tool batteries.
A common face shield could be worn if needed. I would like it to be compatible with ozone generating cleaners such as So-Clean. Perhaps a sealable cover over the filters would allow this with some cleaver tubing arrangement.
Amazing work!
Def a more immediate use of this technology.
Great idea as I was thinking of trying to do the same to an older cpap machine I have, but mine runs on 110v. I know it has positive pressure on the mask at all times and it vents out through the exhalation valve to help you exhale better just like scba the fire service uses. If you could find an MSA scba mask it has the twist turn lock for the regulator to connect to the mask and a hepa or n95 canisters that are a direct fit for checking the seal of the mask. I used one these in the fire service and it would look funny at the grocery store but you'll have full-face protection. Good luck.
This is great - thanks Johnny
Awesome Johnny. Question there are millions of AC blow up matress pumps out there. What about them as a blower and mechanically limiting flow on exit nozzle. Test each diameter for output cfm. Then possibly the only required additional manufactured part is a speed /intermittent controller with flow sensor alarm? Would this work and be more potentially available id love to chat with you on the phone and discuss
Following... great idea!
Someone in the project has been trying it out: github.com/jcl5m1/ventilator/issues/62
The biggest issue is that cpaps are designed to work for many hours at a time. And a typical mattress pump may not be rated for that. So each pump may need to be tested to see how long they can run for.
Wow you are smart!! You even installed micro switch
A tyvek hood with a built in face shield with the hose connection feeding in air would make this a standard style papr... that would also protect from drafts carrying viral material since the purified air will constantly flow down your neck and out.
Thank you great idea, A used komplett CPAP Machine I can get around for 300 euro plus/ minus . But I didnt know how a to put a bipap cycle on it. With a small ventil You can get even go to controlled ventilation I suppose. . And with a oxygenconzentrator ( up to 6 l /min) somewhere attached to the system , oxygenconcentration up to 50% in the aire the patient is getting.
Very inventive. Thanks 🙏🏼
I hope you get these into the hands of the wider public. Far, far, far, better for filtering out viral microparticles than cloth and paper filters #MasksAgainstCoronavirus
The incomparable, JOHNNY LEE!
Should explain which parts require cleaning and sanitizing after use
Great job bro 💪🏻
I wonder if someone could make a brushless motor 3d printed blower, 3 speed, for 40MM NATO filters.
Professional level air pump will set you back $40. Get a 12 volt and (buy 3 of them) rechargeable batteries/charger are inexpensive. The 40 mm NATO P100 is your best choice but 3M painter mask filters are easy to replace and to decon daily with UV light. For adapters you can go to PVC plumbing fittings. Plastic hose is cheap. Instead of half-face or full-face masks you get better comfort ratings combining a HAZMAT hood -- back side air duct -- with a simple face shield. Duct Tape makes a perfectly good, durable seal.
I think the filter and motor unit need to be in open air not a back pack, maybe a belt or harness. Keeping it in a closed environment will strain the motor and back pack material could be blocking airflow through the filter
Very clever... awesome project.
Keep in mind that most infections happen when you remove the gear (at least in hospitals)
Hospitals are very different environment; they constantly having physical contact contaminated surfaces and air spaces, and moving from many different potential sources in the course of a day. They have layers of ppe that have to be removed after being exposed to a to multiple infected surfaces and people for hours day after day; it's a much more complex matrix of potential exposure compared to what most of us experience. In a non-medical setting in which an average person needs to run crucial errands perhaps once a week; their protective gear can be removed and stored for several days to kill the virus and as long as they are washing their hands immediately, there shouldn't be any transfer. If being especially cautious one could remove "outside" clothing and store it with their protective gear.
The man just called...
he said YOU DA MAN JOHNNY
not even joking, you could probably seal that tape more with flex seal type spray. it would essentially put an airtight hardened case around your tape work.
This is great info! I am hoping to use this information for another purpose, I would like to build a face shield using an older firefighting face shield with positive air pressure for woodworking so I don't inhale the find sawdust particles. Do you have or know of any videos that show step by step how to hook up a blower motor like the one you had to a battery? I think that's the next step I will have to learn.
Commercial PAPR systems are crazy expensive. The 3M system is excellent, but is about 2 grand. A couple small companies have made lower cost power visors. I had one made by RACAL and there is a small british company called Trend that makes a simple one for $400. If you can come up with something cheap for woodworkers, you could probably have a lot of supporters on kickstarter.
Now there's going to be a shortage of vacuum cleaner bags.
Maybe. The breathability is very bad on vacuum cleaner bags.
Wonder if my wife will give up her old cpap machine...
I like the mask you found - looks to be small enough to fit into a Plague Doctor mask.
This one actually has potential! Hospitals do have a significant need for Papr's ? how long does the battery last? and couldn't you 3d print a housing for the blower, then Use gasket and screws, Tape doesn't seem like a very long term solution, or even a very durable solution.
Put a cutup raincoat airtight around that faceshield.. rivet and glue it airtight.. no need for reapirator and goggles then.. also add UV Tube into airflow After Filter for added protection.. you can use These only P3R Filters for cheaper build..
I have a spa blower but it blows out air rather than oxygen. However it would still need an air filter.
They have full face cpap masks that could replace the shield
Great video!
We just made a PAPR. Not perfect. Used a small shop vac, clear trash bag, duct tape, and a fliter on the suction side. Cut about a 1 inch hole in the top of trash bag. Duct tape hose and bag around neck. Turn it on and the bag blows up. Please note that I used a corded shop vac. Best with a shop vac that uses recharge batteries.
Can you send me a photo of this. Travelerusa40@yahoo.com
@@Traveler-PKK sent a picture. video would not load up. thanks hope this helps
Could you send me a photo of this as well? takasoramasuda@gmail.com Thanks!
I tried to do something like this. Unfortunately, it is impossible to find filters as an individual. I called up a couple. I called up a few domestic manufacturers and explained what I was tryign to do. No good "We are only providing to health care right now" :
are you able to shows us how to build automate Ambu bag
squeezer?
ICU nurse here. This idea is awesome, and I agree - this would have more impact in the long run than homemade ventilators. My concern is that we will run out of available CPAP machines like we are running out of ventilators, since both are in use for COVID patients. Do you have alternative ideas to using CPAP parts?
Better not to use the CPAP for Covid19 Patients as ventilator alternatives. The plus side is it free's up CPAPs for projects like these (for caregivers). www.npr.org/sections/health-shots/2020/03/27/822211604/cpap-machines-were-seen-as-ventilator-alternatives-but-could-spread-covid-19
How is the filter getting fresh air if it is inside a backpack?
although the restriction would be great a hepa filter off a vacuume cleaner would probably work also. and may stand cleaning with bleach solution of 1.5%.
be well
It's a nice upgrade from a filter mask and I think it's really helpfull for doctors in the field or taking care of someone infected in your house, but I think that pitching it for the general public as a protection upgrade for every day use would worsen the shortage of available filters for the former, even more if you take into account the shortened life span of the filters because of constant air flow.
Maybe you can test the effectivness of diy filters, I have seen some examples from other youtubers that use diferent combination of household items, from toilet paper to actual rolls of certified filter cloth.
Sorry for my grammar, this Is coming from a chilean.
hi Lee i did not get how the CO2 will come out from your device..
I appreciate what you are doing
I know I'm late to the party but could one spray it with flex seal after protecting the holes?
Why do you need the blower? If you just attached the filter to the mask, wouldn't it basically be the same thing?
See Johnny's reply below: "Full face gas masks can be somewhat laborious to breathe through. So, the pump makes it easier to breathe and less weight on the face."
great info
Have you considered an exhaust filter?
Great work!
Where would I find the information on how the switch changes the blower speed?
please provide link, form where we can buy the air filter catridge...
Ok , how about this ; a car windshield wiper switch set to intermittent, to a car blower motor , to a tube to a mask ? You could hook it to a 12 volt converter or a 120 volt converter ?
Good job Mister. I wanna ask you where i could buy the blower and the battery power like that?
Maybe this question will not red. But yeah it's my try. Thank you sir.
God bless you. 👍
next u should build desinffect chamber after long walks outside.
Look into UVC lights.
U r da man bro, thanks a lot.
If you could somehow 'seal' the edges of the clear shield to your head (foam, cloth, etc., quality of seal would be inversely related to amount of overpressure available) and the blower supplies air to keep the space in front of your face positive pressure relative to the outside, wouldn't that obviate the need for the mask and goggles then?
Yes. I was just in the hospital for pneumonia and their papr gear has a cloth like material around the shield and they needed no protective eye gear because the shield was effective. The only ones who needed extra protection were those with coughs or cold like symptoms to keep their patients safe.