I am building 1000 of the world's quietest fans, for use in air purifiers. There is a crowdfunding campaign, see bigquietfan.com for details/signup.
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I made, by hand, the best air purifier in the world, and donated it to a social center to keep people safe. It was made to last for decades. Today someone texted me to say they had thrown it out. I asked if they can fish it out of the trash, no answer.
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I think this is really worth sharing, a biodegradable n95. A mask per person per day is not sustainable without such a thing. If we are going to be about more masking, this has to be part of the program or it will all come to a grinding halt soon enough. g95.com/products/oceanshield…
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omfg, the community center is saying they don't understand what the big quiet filter box I made for them is and they want me to come get it, they don't want it. You can lead someone to water but can't make them drink...
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This kind of thing can undo everything that those of us in the clean air community and well beyond are working so hard for. One of the reasons they like thermobaric explosives is the pressure is longer duration than an normal explosive, better destroying human blood vessels, killing even more cheaply. And it's largely about cost, there are plenty of ways to kill without them. They are obviously planning to do a lot *more* killing of humans.
BREAKING: Israel has dropped a new type of bomb in Gaza.
Palestinians claim it’s a “mini nuke,” but analysis suggests it is likely a thermobaric (vacuum) weapon.
Thermobaric bombs detonate by dispersing a fuel–air mixture, producing a high-pressure shockwave and intense heat. This can collapse structures and cause blast effects similar to a nuclear detonation in terms of overpressure, but it is not a nuclear weapon.
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I went to the Anarchist Tech Convergence this weekend. Almost every single person there was wearing a good N95. It was amazing, but we don't take pics of each other so I cannot show it. Clearly there is hope yet.
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The person answered, they are a good person, what happened was someone deliberately waited till the garbage truck was right there and threw it directly in. Not clear if they are just profoundly clueless or malicious. Either way they should be held responsible.
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I went to another event today where almost everyone was masking, with actual n95s. The anarchist book fair. Again no pics allowed, but this is surprising me. I mean same location same general community, haven't seen this till very recently... Baffling but good.
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This is why you don't give people like this things for free. To be fair the one at Foulab people really appreciated the one I donated there, and so I upgraded it, and may again in the future.
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This is also a great example of the fact that there are some serious people problems that need to be solved. The machine performance alone is never going to be enough if people just throw them out. It was nearly silent in that environment, took no floor space etc.
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I don't think that's a winning game. People need to understand things if we are to have a functioning society. There is no substitute, no amount of rephrasing or pandering to ignorance will solve this. Use terms that make sense, then educate.
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Well I just got back from the dentist and they were wearing n95s and had filter appliances running. They said the college requires it in Ontario. So not everyone is crazy I guess.
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it's always like this, the admin people can't get anything right. The success of the machine, how far we have come in the last few years in understanding and cleaning the air. Then people just don't even get it. The real problem is it's not just them they make sick.
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Well mostly people just don't have to be total morons, I mean I think that's an even lower bar still. But I guess you could say that too.
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I know, I actually told them it was on loan, not a gift. So technically they owe me now. I'm still deciding if I want to force the issue.
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Similar deal here, but I started watching soon after they started. I watched almost all of them till a certain date, hundreds. But the I started to realize it was mostly rationalizations for plutocracy and gave up on them. Still there are good needles in that haystack.
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The ruling class wants to severe
them off from society so they can get away with enslaving and abusing them, that's the point of jail. Prison slavery is fairly common.
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I seriously don't understand why people still buy conventional "hepa" air purifiers when pc fan based devices clearly are so much better. This warrants understanding but I have never gotten anywhere understanding why people persist in choosing inferior options.
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Someone stole my motorcycle right out of my garage once. I was able to track it down, it was a guy why tried to buy it from me previously and had given me his address. I had papers etc. Police not only refused to help, they said if I took it back *I* would be charged!
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I just made one today, or almost. It's in pieces but it's basically done. I made another one last week but the filters were kind of hard to get in. The next one will be better. Oh and it's about 5x the capacity of the best cr boxes. And as quiet as a pc fan box at 1110 cfmflow
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Here is the "concept sketch" of a window mount energy recovery ventilator that should harvest as much energy and give as much fresh air as a $1300 centralized unit, with less noise, for maybe $250 in parts. The top panel is removed so you can see inside.
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I charged all seven of these uvc nukit torches and brought them to "Revolution fest" last evening, and offered to set them up. The organizer acted like I offered to give him covid-19, not prevent it... Bit of a sucker for propaganda, I guess.
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After having a number of discussions today about anti-pandemic measures, I feel strongly that indoor air quality is by far the best buy. For only $40 a year we can chop risk for ~60 people by 80%. Compared to the disease burden or even a year of masks 8 hours a day, pretty good
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The thing is, I'm not inclined to try to persuade them because I know if they don't really go for it to begin with, they aren't going to use it.
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Can we please stop implying that it's ok to kill men? It does not help when you start from such a place. No killing innocent people. No exceptions.
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A big quiet fan with 10 merv 13 filters is ready to go to foulab tonight, to be the first actual real world install of the bqf in a community space! Filtering tons of air very quietly :). Should be about 1200 cfm actual cadr with these crummy filters, at 40.6 dBa.
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Honestly the pc fan array in a window trick is under appreciated. I got 8 p14 max fans in my window on a variable voltage power supply. I can get a hurricane of air, or turn it down to 4 volts and it's nearly silent but still a bit of a breeze. Wind is unreliable.
What’s a good way to keep air clean at home (not just purifiers)? Any simple habits or tricks that work for you?
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Not that I have any way to make them pay, but I can tell other people in the community they are deadbeats if they don't pay.
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Of course the mask is itself not a good design. They need to just copy the aura. But they got the fabric/filter stuff so if we keep going we can get somewhere good.
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I built another big quiet filter box! This is #3. Measuring the pressure drop at 300 rpm indicates the flow is probably the same as it is with the 3M filters, but these filters are way cheaper. This will go to a community center on the weekend. I'll make the next one smaller.
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The "what do you want us to do" is particularly abhorrent to be because you can see they are leveraging the knowledge gap. The patient doesn't know what the nearest reasonable diagnostic investigation is. To pretend there is no options is abominable.
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I was wondering how the Nukit UVC torch spectra compared to sunlight, 5 seconds later, had peer reviewed actual data on my screen, linked to from the product page. No other manufacturer of basically anything ever gives you that. I'm having more difficulty getting sunlight data!
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Big quiet air purifier #8 is done. Again, the main point here is that it gets about 5-20x more clean air per dollar at a given noise level, total cost, than the next best machine(s). More given labor saving remote control/monitoring features.
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Sounds like they still could. I would feel pretty awkward asking people to do such a thing. But I would totally do it if someone asked. How could you tactfully alert the others this is happening?
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Big quiet filter box #5 is now done. It gets the full 1110 cfm at 300 rpm, 36.3 dBa (has weights). It can do 1450 at 47.3 400 rpm but I limited motor power to 350 rpm. It has the wifi monitoring/control and anemometer. Total parts cost ~$415 CAD.
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I wracked my brains to produce a design for a window mount energy recovery ventilator that I could actually design, make and sell reasonably. I figure if I could sell 5 of these off the bat that's worth doing. I want it to be cheaper and better on every count than the purifresh
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I don't quite know how it happened, either. I think partly it's because all the organizers were wearing them when people started showing up, and it said please wear a mask on the website. As people arrived, they always didn't want to be the dick that wouldn't mask.
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*brings 7 UVC torches to a social event*
*making conversation, the devices come up, turns to covid in general*
guy:"how many times you been infected?"
Me:"never, as far as I know"
g:??? that's impossible!
Me: because I do stuff like this lol
g: but but....
Amen.
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Best luck! I hate how they use patients like human shields and blame the workers for striking, it is absolutely abominable and it fools far too many people, but they aren't going to fool me so easily. Canada post just won a labor action over here. Solidarity forever.
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Success! I have developed a draft mod procedure/recipe to modify a Nukit torch to run continuously on external power, it still works with it's battery too :). Nearly any power supply from 6 to 39 volts works. Remember these are by far the most cost effective 222 nm uvc emitters.
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Here's the latest prototype of the personal under chin hepa filter thing. It's the same as before except I put a cover on, tied up a few loose ends. The plan is to send this one to @ghhughes for confirmation. It got a protection factor of 6.9, tested with a portacount.
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I went to a social thing (with n95 on) at a community center, and was surprised to find my machine. Someone from l'achoppe had understood it's value and brought it. There are about 230 people in the room, only 8 masked. Some surgical. Some will still get sick today :(.
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In all the filter/cr boxes I've seen, the interior and even bottom side of the cube is not used. Understanding that larger filter area does not increase cost per cubic meter of clean air, I'm exploring designs that cram tremendous amounts of filter into nearly the same space
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Friends, comrades, I have good news! I have been graciously given some funding to proceed with the design and pilot production of the Really Quiet Big Fan :). This is about doing something which should have been done a long time ago and would be absurd if not done eventually:
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Almost everyone, even clean air advocates, is still almost always focusing on HEPA for air filtration. We complain how others never seem to learn, but let's practice what we preach. It may or may not be hepa, cadr is the main thing. HEPA is fine but it's not what matters.
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So this is a very interesting lesson, and a super easy way to get people to mask, then. Even the presenters usually masked. It was tempting not to because honestly if everyone else is, and we have purifiers and uvc (we did), there is marginal value while presenting. But we did.
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I see a number of people talking about number of virus particles etc. I'd like to remind everyone that there is a common and better way to talk about the quantity of infectious particles in the air. It's the so called quanta. Inhaling one quanta causes ~63.2% prob of infection
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I made a mock up of the 10 filter filter box, and a document to help the next person make one, out of tape and cardboard and filters only. It gets about a 1180 CFM CADR with cheap filters and my big quiet fan *according to my instruments*docs.google.com/document/d/1…
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Remember that study showing 25 l/s clean air gave 80% reduction in infection rates of covid-19. Now how much does that cost? 53 cfm cadr. ~$600 for 2100. $15 per student. One time, not/year. Then about $300 for new filters every 4 years, per machine so $1.875 /student/year.
Or we could spend $1,000 per child improving ventilation and clean air in schools so that they don't get sick in the first place.
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Dude, we don't need more motivation. We need results. There should have been an arms embargo a long time ago. Now there has to be a military intervention, with enough force to counter all those arms the US gave them. Nothing else is enough.
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Myself and two others have pooled our resources to buy a portacount! We will complete our main projects that we bought it for, and then it will be available for community use at Sensorica! We have accessories and it's all tuned, thanks OpenAeros!
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I don't think things will collapse, they will just get worse and worse till we are in a dystopian cyber middle ages with the worst of both ancient and modern worlds. A true collapse would be preferable because something better could grow back.
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Some people, perhaps babies, find noise comforting. If they don't hear it from outside, they make it. Apparently this is partly why some people walk very loudly. Perhaps a recording of the bar played at suitable volume would be useful?
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I made a pc fan based anti covid-19 filtration appliance, estimated cadr 250 cfm, extremely quiet, honestly I'd estimate 35 dBa, literally can't tell if it's on given typical background noise. $97.99 exactly including power supply and tape . Fans/filter:
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Judaism is a religion not a family.... if you go back farther, people came from somewhere else in turn, and also why did they leave? I'm not trying to imply x or y, but the idea all these partial descendants have an unholy right to return 3000yr later is pretty sketchy.
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Nukit torches are here! I'm very grateful to be able to get such a well made bit of tech at such a bargain price :). I mean smart phones are cool but they don't prevent disease :D. From a reliable and ethical company, too.
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Update: I'm not the only one upset, and we are proceeding with the priority of getting new machines with the same or greater cadr. I'm not willing to give our even loan them another bqap, but I am willing to advise and help them build pc fan based devices, which are next best.
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Here are some basic renders of an air filter appliance based around the Big Fan I'm designing. I can build it to test the fan and if I can find funding, I think it could fill a good role as a product. The sims indicate about 750 cfm with merv 13, if 80% suppose 600 cfm cadr.
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I once asked for a copy of my entire record. It was like pulling teeth. They made me go and review it all with them for 30 minutes before they would only give me a printed copy. It took forever to collect all the chunks from different providers too.
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That's a scam, they charge large amounts for shipping, usually anyway, that's how it goes. Even this stuff isn't that cheap.
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You do not know that. You would have said exactly the same thing about gila monster venom. You are not the right person to decide.
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Big Quiet Air Purifier number 6 is now done. Assume the same 1110 cfm flow through merv 13 filters (cadr could be between 940 and 1060) at 300 rpm ~37 dBa, 350 rpm max. A few improvements, few bugs squashed. Next is to get full 400 rpm/1450 cfm back for num 7
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Kickstarter rejected my campaign to mass produce the big quiet fan. They won't even say why. I appealed. Well if they are no good there are other crowdfunding platforms.
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Here's the final design for the super quiet reversible fan for my through wall and window mount energy recovery ventilator(s). I need to improve the print quality but the design won't change significantly.
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There, my personal hepa filter thing is ready for testing :). It can run on any power bank, even crummy old ones. I think I got a good airflow pattern. It gives a very reasonable 36 dBa noise level at a very usable flow rate. It would probably be better to put
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Big quiet filter box #2 has now been installed at a vibrant community center! Nothing but the best cutting edge tech for our community :). Cadr estimates had to be revised based on measurements, so below the fold.
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A big quiet fan and 10x filter box has now been put in a good spot at Foulab! The white thing in the lower left corner is the old filter. It was so loud and gave just a trickle of poorly filtered air. But now we've got nothing but the best for this community space!
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My friend and comrade Austin graduated recently and posted on Linkedin today that he is committing full time to start a business making and selling window mounted energy recovery ventilators at a great price ($300 USD each 60 cfm 80% efficiency including water vapor). Link below.
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Adam's activated carbon filters are the only ones I have ever seen that are a good buy and come with actual testing. If you want to remove vocs from a room (without outdoor air) they appear to be the only game in town! Link is to test info. Buy: air-fanta.com/products/3pro-…
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I have critical medication stuck in the mail. For two weeks now. And I'm still 100% supportive. I will go to the pharmacy and try to get an emergency refill type thing. Solidarity forever!
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I was at the pharmacy and noticed one of the staff was wearing a mask. She said she was immunocompromised. I went home and got her a nukit torch that can run on external power and said there is more where that came from if she wants them! I wonder if she will use it...
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The WM12 Beta v1.0 window mount energy recovery ventilator is now complete and fully functional. It gets 60 cfm, est. 85% efficiency and 42.4 dBa noise on max power with the extra little green pipe segments (calculated from 43.5 reading and 37 background).
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I wouldn't consider consider that a fair ask unless profit margins were relatively high. In manufacturing the rule of thumb is something should retail for 5x the cost to make. I'm sure those kits are far lower margin than that.
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I'm shopping for a 222 nm UVC source for a community center in Montreal. Krypton MVP: trash, lies everywhere, no data. x-one: trash, no reason to think it even works. UVCAN lily: $50/mW, lilac: $41.3/mW. Nukit: $6.42 per mW. And UVcan might be lying, how would I know?
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Here is V2.0 of the personal HEPA filter. The annular conical jet helps a lot to make it small quiet and light while still giving an adequate clean air zone while you walk or drafts arise. The power supply is unaddressed. Alas it's not really much better than V1.0
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Someone is singing my song :). If you really consider that the units go in pairs, efficiency, flow, noise, and pack of long term design, the economics add up remarkably poorly for conventional units like this. My tw4 is roughly 25x return on investment, quieter, wifi...
Mechanical ventilation with heat recovery (MVHR) is the quiet achiever of ventilation. Continuous fresh air from outside without losing thermal comfort inside. Should be in schools and other superspreading sites. Super cheap to run too. h/t @DrPieterPeach
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The polymerized (or oxidized?) oil of some veg oils is incredibly resistant to everything. We used to use various veg oil as lubricant in milling. It would get everywhere and was extremely hard to remove. I had to stop using it mainly for that reason.
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I once saw a science museum exhibit which had several puzzle peices, from which you could create a face that looked like almost anyone. There are only a few thousand faces, actually, except minor details.
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100%. Kids are not their parents. The hospital needs to be properly built to contain the inevitable cases of measles and other highly infectious diseases so people with them can be treated without spreading infection. That's exactly the sort of thing it is for.
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Here's my idea for the next filter configuration to try. Presumably this should get more than the previous 1030 CFM CADR. It took me embarrassingly long to realize putting them diagonally like that was a good idea. I think it will reduce internal flow impediment.
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Imo the anti aging community should be more on board with stuff like masking. Covid basically ages you, reliably masking in public is probably one of the best anti aging tricks we actually have.
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I successfully powered up the big quiet fan today! The next step is to just put filters around it like a cr box, and measure flow and pressure. Looks promising :D
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My PC fan filter box comrades: what's the BEST performing PC fan you know of, for filter box use? The P14 is the one I've been referencing because it is pretty good but also cheap. But can you share that which gives the best flow to noise ratio that you know of?
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I was talking with someone IRL yesterday who is big on clean food, water and also wants clean/"pure" air. But they don't want to run their air filter because they think it makes the room cold.... hm. So they use a vaporizer to *add* smells (VOCs) to the room. Not good boss.
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In the spirit of Open Source collaboration methodology, I'd like to share my proposal for a Very Large Extremely Quiet Air Filtration box/appliance and business/production around it, in case anyone is curious/has feedback docs.google.com/document/d/1…
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I haven't been saying much but I continue to print/assemble big quiet fans. Working on eliminating motor hum. The personal hepa (buying a portacount). Going to fabricate a data logger for @VentiloAngel. Designed a pcb for the tw4 to replace the complex manual wiring process.
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I took my collection of Nukit torches to Foulab, the Montreal hacker space, for the open night. They were too afraid to use them and didn't want to look at the articles I had brought right then but agreed to take one and think/read, and try again next week :).
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hepa filters may be more readily available in europe, but not north america, the furnace filters are super common here. There are quite a few people selling the pc fan units with their own websites etc. Nukit, cleanairkits, northbox.
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Well that does actually happen sometimes, the solution is to make sure the system is maintained effectively. It has to be cleaned or mold and stuff grows in there, also some people correlate AC with poor indoor air quality, which should be fixed. Feeling ill is serious.
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Here is a sneak preview of what the first 10 or so WM12 window mount energy recovery ventilators will look like. I kind of like the greenish/teal pipe :D.
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Now that I understand a bunch about the flow to noise ratio of fans, I decided to cobble every spare pc fan I had together to replace a window box fan. The most important issue at hand here imo is the importance of general purpose quality building blocks.
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"I wrote a little simulator in python based on the best data and science I could practically get that calculates the qaly loss of various behaviours, and it appears to be a favorable investment to mask, get boosters etc., compared with other common and profitable undertakings."
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I measured the stall pressure of a P14 fan. It's 1.45 mm. Not 2.4. arctic is lying. Says right on their website, 2.4 mm. That's a huge difference. I wonder if they are lying about flow, will check that next. We try to get somewhere, and this is what we stand upon.
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I'm imagining a good solid 3 months or something where we actually coordinate everyone wearing a respirator, would it come back or be forever history, I wonder...
“Respirators are so effective that United Kingdom research has indicated their use by the public would have dropped the rate of COVID transmission by an estimated factor of 9, compared with 0.6 for surgical masks. A factor of 9 is enough to put SARS-COV-2 into exponential decay.”
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