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.

Joined March 2022
507 Photos and videos
Open_ERV retweeted
I've received over 50 threatening messages from Zionists because of the videos I posted documenting the brutal crimes committed by Israel in Gaza. I need your support and kind words to continue until my last breath 🇵🇸
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Open_ERV retweeted
AI machines acting autonomously killed humans for the first time, it was revealed today. Ten AI-powered drones were given full authority to choose human targets and kill them, New Scientist reported in its latest edition. The operation worked. The killings took place in Ukraine two years ago, but the information was never before publicly admitted, the journal said. . CLEARLY VISIBLE CORPSES “We just launch it and we know everything will be dead – everything that will be found there in this particular area will be dead,” drone-maker Alexander Kokhanovskyy told the publication. “There is no connection to the drone at all, you cannot see the video, nothing… Everything it sees will be killed.” Afterwards, the Ukrainians sent regular drones—fitted with cameras and piloted by humans—into the same area, to see if the AI had killed people. It had. There were clearly visible corpses and a disabled truck. . USED ON OTHER OCCASIONS This has probably happened on other occasions, the journal said. “Reports in 2023 suggested that Ukrainian attack drones equipped with artificial intelligence were finding and attacking targets without human assistance – but were being deployed against vehicles such as tanks, rather than infantry,” the journal said. Human casualties may well have been in the destroyed vehicles, but they wouldn’t have been visible. Why are the Ukrainians revealing this horrific fact so casually? With the massive demonization of Russia in the western mainstream media, they likely think that no one will care, since the victims were Russian. It’s worth noting that Ukrainian drone makers are working closely with the US and UK armed forces and doing shared tests in the area. And that warfare in both Ukraine and Iran are being used as training material for a US attack on China—more on that below. . WHO’S IN FAVOR OF KILLER ROBOTS? But seriously, we have to ask: are autonomous AI flying killer robots, with permission to kill humans of their choosing, a good idea? Most people don’t think so. In 2019, China and the majority of other countries of the world met at the UN to discuss a motion saying that killer robots are an obviously horrible idea and should be banned immediately. Guess who disagreed with the motion? You can guess the answer. Think of the four most ruthless nations. Correct. The US, the UK, Russia, and Australia disagreed. (Ukraine hadn’t gotten into drones at that time.) . LONDON HAS A TASTE FOR THEM The British leadership definitely likes the idea of robots killing people. In April last year (2025), the idea was floated in the Times of London, under the genteel headline "Drones may strike targets with no human input, says minister." The word "drones" sounds nicer than "killer robots" and "strike targets" sounds better than “humans”, right, British government? . BUT THE U.S. IS WAY AHEAD No one doubts that the Pentagon is well advanced into making flying AI robots who can choose which humans to kill. “The Pentagon has been trying to develop AI-powered autonomous drones for years,” said Katrina Manson, a US author who writes about AI weapons. The US is developing flying killer robots called Goalkeeper and jet-ski style killer robots called Whiplash. Both are AI powered and have the power and ability to destroy humans of their own choosing, she says. By putting AI into airborne or waterborne weapons and then giving them permission to kill humans, it means that the US can still keep killing people even when radio contact cannot be maintained. “The military is also working to put AI directly into its ‘one-way attack drones,’ so they can navigate, locate targets and carry out lethal attacks even when wireless communications have been severed,” Manson said in a recent book. . CHINA IS ULTIMATE TARGET They are being prepared for war on China, Manson says. “Starting in 2022 the Pentagon’s Maven team began collecting enormous amounts of imagery of Chinese vessels in the Pacific, which they used to enable the creation of algorithms that drones operating there could use for targeting.” The tragedy of all this is that many futurists, including author Isaac Asimov, saw this coming and warned against it. His “first rule of robotics” states that a robot may not injure a human being or, through inaction, allow a human being to come to harm. He believed that failing to follow this fundamental rule would doom the human race. Many people still agree. And there are some who will stand up and say so. In February this year, Anthropic, one of the world’s top AI companies, told the US government that it did not want its tech to be used for autonomous weapons that kill humans. The US Department of War immediately blacklisted Anthropic—and found an alternative partner, OpenAI, the same day.
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This is exactly why I have to shoulder the job of saying this kind of thing. I'm not "attacking" anyone, it is a mild and very valid criticism on an important subject. Clearly the idea that non-profits cannot be criticized even constructively is part of the problem. To some degree this is a cultural problem. I don't believe saying nothing while someone shoots themselves in the foot in broad daylight is reasonable just because it's "their choice/fault". If a community of people, non profit or not, is to accomplish anything real, you can't just be cowards all the time on every subject in every way.
I opened by saying I didn’t agree with his actions on this. You are correct, attacking charitable donations isn’t ok no matter who does it. I still take issue with your framing.
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Ok I'm sorry but this cannot pass without comment. Promoting a machine which gets a seriously inferior actual cost to performance ratio is really weird. If it's for a school with wacky purchasing requirements, that's one thing. This is for people who have no such requirements. Why are you promoting this machine rather than the other machines such as the Northboxes, clean air kits, Tempest or other machines with *superior actual performance to cost ratio*? If you want clean air, then that's what you do. This is something else. This machine is 480 GBP for 288 CFM cadr. That's 643 USD. The northbox polaris get the same CADR, lower operating cost and slightly less noise for $365. The tempest is similar. The ones I build in my workshop are $79 CAD, $57 USD, slighly less cadr, in the 230-250 range, same noise level basically, probably lower running cost. That's a huge difference. I call that profit, basically. This is not non-profit behavior and it's not in pursuit of clean air. It's something else. This bothers me largely because it's so disrespectful to people that are doing a good job offering solutions. It's a ton of work to get that performance to cost ratio, and then make and ship units. That needs to be appreciated or nothing *real* will ever get done. And you don't even use it, instead you pick the inferior one??? Indeed, it has not been getting done. Very little deployment of clean air measures has actually happened over all these years. If this is the approach even the advocacy orgs and "non-profits" are taking, no wonder. Now I know it's bad to criticize well meaning orgs and so on but that's partly how this kind of thing comes to pass. We all have to do our part to strive to encourage doing the actual things that actually matter, and to do a good job. Sometimes that means criticism. I also build, in fact I do that a lot, and not just machines, I also do the workshops for instance. And I elevate people who are doing a good job, indeed I am doing that right here at the very same time. These all have their place.
This month only: Smart Air UK donate one SA700 for every 10 sold to the Corsi-Rosenthal Foundation. We donate it to someone who needs cleaner air. Code CRFUK10 saves you 10%. June 30 deadline. #CleanAir go.corsirosenthalfoundation.…
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There are just so many issues. It may seem like a harsh or unreasonable criticism, but it is very important to actually get things done and do a good job, or none of us will have what we need, that's the reality, not just on this subject but practically everything. This is the core of my argument, it gets complicated fast, but this is what it all boils down to. There is a lot to do in this world and it's not getting done very well, and this kind of thing is an important part of why. I just want to do better, because we all need it, we really do.
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Open_ERV retweeted
"Cruise ship confined spaces and HVAC systems facilitated 👉aerosol👈 transmission." We will accept apologies now from the Droplet Dogma gang. And @WHO. Soutce: Hantavirus outbreak on cruise ship: public health challenges. Biosafety and Health, Jun 2026,
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Open_ERV retweeted
اتوبان مرگ این تصویرتعطیلات آخرهفته نیست وقتی عراق با تضمین سازمان ملل آتش‌بس رو قبول کرد،کویت رو ترک کنه، بوش پدر دستور داد یک عراقی رو هم نذارید برگرده. اینها۱۰۰۰۰نظامی عراقین که با بمباران هواپیماهای آمریکایی همینجا قتل‌عام شدن. عهد و پیمان غربی معنایی جز خیانت و خنجر نداره
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It's the season once again to marvel at the astounding ignorance on air conditioning. You can take a walk at night and hear the hum, when it's 18 degrees out. A single cheapie box fan in the window could provide 8 kilowatts or so of cooling power at 1500 cfm, if the incoming air is 18 degrees and the outgoing air is say 27.5 degrees. That's 27,200 BTU/h. You can get more cooling power, nearly for free, far better air quality and maybe less noise, depending on your AC unit, than a typical window mount unit. It's called night swing cooling, and has been around since ancient times. Apparently the capitol building in Washington DC was designed to use it, and over time ignorance dominated, and they tried to seal it up and use window AC units. It was incredibly loud, and did not work as well, it was still too hot. Eventually someone realized what was going on, removed all the window AC units and started using the system properly again. In some countries they also leverage evaporative cooling, and water reservoirs to increase the heat (cold) storage capacity, with wind catchers to move the air. Very clever. Ignorance and laziness expand to meet the size of their container. Understanding should be more advanced than it ever was even among regular people. Instead, because they don't have to know any more, they don't know.
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Open_ERV retweeted
Jun 12
"This is the final farewell between P_alestinian prisoners and their loved ones moments before they are taken away forever. On March 30, 2026, thousands were condemned under “t*errorism” charges, a profound injustice. Nearly 11,000 lives—most of them young, now stand on the edge of silence. We live in a world where videos of lonely penguins and playful monkeys go viral in seconds… yet speaking about prisoners in P_alestine feels heavy, constrained, almost forbidden. And somewhere between our silence and our fear, their stories begin to fade…" ©aestheteofyoursoul
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The SA700 is £480. With code CRFUK10 it's £432. Running it costs about £25 a year - roughly 7p a day. Computer fans on 10 watts. Your purchase also helps us donate one to someone who needs it. #CleanAir go.corsirosenthalfoundation.…
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Open_ERV retweeted
We're looking to partner with organisations, communities, or individuals that can help service, repair, and refurbish air purifier units. We've been thinking about groups like Men's Sheds but we'd love your thoughts. Drop your suggestions below.👇
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I experimented with PCTG filament. I had high hopes, but it's not much better than petg really. Not as strong as CF-PETG. Prints fine, though. Less stringy, which is good. When you bend and try and break the raw filament it seems amazing, but for whatever reason even in-plane (not effected by layer bonding) it's not very good. 72D TPU is the most amazing material I have encountered thus far, of course it's too soft/flexible for many things, but it's incredibly tough. I made some drone parts for a guy at Foulab and they survived a crash no problem, the identical parts made from MPLA broke. I'd like to try PCCF, carbon fiber reinforced polycarbonate. PC is in generaly extremely strong, and the CF both makes it even stronger and also reduces contraction enough apparently you don't need a heated build chamber. A heated build chamber would definitely be a good idea but I don't really need one, for now....
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Open_ERV retweeted
"There is something absurd about being told that footage of your destroyed neighborhood violates community standards, while the destruction itself continues uninterrupted. Something darkly funny about an app warning you that your post about a massacre is “too violent,” as if the violence begins with the image and not the act. The platform is offended—not by death, but by its documentation." -Taqwa Ahmed Alwawi
Our latest: "Gaza is Too Graphic For Community Standards" by the brilliant Taqwa Ahmed Alwawi @TAQWA19AHMED palestinenexus.com/articles/…
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Where the hell is the rest of the world???? How is this any less bad than using a nuke? Nukes are not magic. Everyone should just ask what we would do if they did use one, and then do that now! What are people waiting for?
Jun 10
Horrifying scenes from South Lebanon. Israel is carpet bombing Tyre, wiping entire civilian neighborhoods off the map. No military necessity. No restraint. Just relentless terror. This is an American-backed, American-funded genocide.
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I am making 10 big quiet fans, fully printed. This has some issues, they don't look very nice and the printed PETG is not as strong as I would like, but as long as you don't drop them they are plenty strong. I will give priority to anyone that emails me, especially with a particularly interesting use. The price will be $200 CAD each, plus shipping, and duty. The purpose is to sort out the manufacturing process a little better, the $200 just offsets the costs a little bit, not much really. They will have a protective grill on the side that is open when used in a CR box, but not on the intake. There really is no need for that. I may try using PCTG in place of PETG to increase durability, but it's about twice the price. PETG on the big printer has a serious tendency to string with the large nozzle, at the optimal temperature for best mechanical strength. I remove the strings but it leaves a lot of scuff marks etc. You have to be more interested in what it does than how it looks. Email me, address on openerv.ca, or DM me, and I'll put you on the list of people. I will sell them through ecwid on my website when the time comes, and email people on the priority list with a heads up, maybe give them a week or so head start. If there are issues, return (I will pay you back for shipping and duty) is the only practical remedy, I think. I can send repair parts in case of damage but I've found it's impractical to try to troubleshoot issues through the internet, on any subject basically, not specific to BQFs. I've many times found it very hard to get people to listen when I tell them something is a *prototype*. This is why I cannot provide any complex remedies. If I get a lot of returns, well that's part of the research side of things, I'll figure out why and adjust.
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I installed a system at Foulab that automatically turns the air purifier off when the door is fully closed and locked, which is I think a reasonably reliable occupancy indicator. There is also a manual override. The BQF has a PWM in so I just had to run a few wires to a magnetic sensor and a small pull up resistor. The door sensor is closed circuit when the door is closed so this was perfect. This way we greatly extend the life of the filters, so I am willing to sponsor filter replacements. That's one of my contributions to the lab, basically.
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Open_ERV retweeted
I'm surprised by the unreasonable effectiveness of giving people a small amount of money. When I launched the "Fast Biology" microgrants, people told me that: 1. You can't do anything in science with $1,000. 2. Nobody would submit good ideas, because good ideas are worth much more than $1,000. #1 is mostly true, and #2 is partially true, but neither is absolute. I did get many excellent ideas, especially from people who are too time-constrained to work on them. In some cases, $1,000 was enough to build an entire prototype (especially in hardware.) There seem to be a few benefits in giving microgrants, though: 1. They can subtly nudge people toward working on problems they normally wouldn't (and this can, in rare circumstances, take them down strange rabbitholes that then change the course of their whole life.) 2. They act as a vote of confidence, making it easier to raise additional funds from other sources. People tend to just follow the examples of others; VCs often copy investments made by other VCs, for example, and giving someone even a fake, made-up award seems to elevate their "prestige" in a tangible way. 3. They allow the funder to find interesting people. Giving out these grants connected me with ~6 super intelligent people who I was not familiar with ahead of time. Small amounts of money are a mechanism to surface talent. I continue to meet people who are working on super important or beautiful problems, and yet who struggle to raise even $10,000 for their ideas, simply because they are a) bad at explaining their ideas or b) not working on a problem that is clearly VC- or philanthropically-fundable. I'd like to support as many projects as possible. Therefore, in the next week or so, I'll open up another ~$100K in microgrant funding. (When this goes live, you'll hear about it at my new microgrant website, tinybio[dot]org. More people with wealth should consider giving microgrants. If you'd like to do this for biology, but don't have time to allocate funds, I'd be glad to support or advise directly. My email is nsmccarty3 [at] gmail [dot] com.
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Open_ERV retweeted
I laugh quietly every time I open Google to check the time difference between Gaza and a city on the other side of the world, so I can make it to a meeting on time. The irony is hard to explain unless you are a "so-far" genocide survivor who is still alive by chance and still trying to maintain some sense of normalcy. You wake up in the morning and begin negotiating with life before the day has even started. You somehow find a way to get to the office with the suffocating fuel and cash crisis. You skip asking the office boy to make coffee because you want to carefully make it the way that might help you survive another long day. You put on your headphones and play calming music, trying to drown out the constant buzz of drones overhead and the intermittent artillery shelling near the "Yellow Line" Then you sit down at your desk and open your laptop to check the time difference between Gaza and another city thousands of miles away. Of course, you're not planning a holiday, there is just a deadline to meet, a submission to file about the very genocide you are living through. For a moment, you are juggling calendars, time zones, and meeting invitations like any other professional anywhere else in the world. Then a drone reminds you where you are. An explosion reminds you what you are documenting. A power cut reminds you how fragile the next hour is. And still, the meeting must start on time! So yes, I laugh every time I type that search into Google, because in less than 30 minutes, I have already overcome more obstacles than most calendar invitations were ever designed to account for. Anyways, good morning world!
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Open_ERV retweeted
Israeli minister calls for kidnapping of Lebanese women and children to break Hezbollah morale —— Israeli National Security Minister Itamar Ben-Gvir urged the political-security cabinet to abduct and imprison Lebanese women and children as a psychological warfare tactic against Hezbollah, according to a closed-door leak published by Hebrew news outlet Walla. During a high-level ministerial meeting reviewing expanded military calculations, Ben-Gvir demanded that Tel Aviv abandon conventional strategy and explicitly target the social and familial core of the Lebanese resistance network. "We must think outside the box regarding Hezbollah," Ben-Gvir asserted to his fellow cabinet members, according to the report. The Israeli minister added that alongside occupying southern territory and intensifying lethal strikes on personnel, Israeli forces should actively round up civilians. "We should arrest their women and children and take them to prison; this is what hurts them the most," he stated.
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