Try this DIY indoor air purifier to get cleaner air
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- čas přidán 12. 01. 2023
- An air cleaner can help remove indoor pollutants and reduce the spread of pathogens such as the coronavirus. Washington Post reporter Lena Sun demonstrates how to make a Corsi-Rosenthal box using MERV-13 air filters, a box fan, duct tape and cardboard. Subscribe to The Washington Post on CZcams: wapo.st/2QOdcqK
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I built this not wanting to pay for the expensive air purifier price, I’ve come to find I’ve never had an original thought in my life.
I've been using this for a month now. I bought a cheaper fan for it and is pretty loud. It works great for using in a room while dusting blinds, shelves and vacuuming floors. I've witnessed it sucking the dust right out of the air in two minutes. It's cut our dust collection in half, but i would use a quiet Winix or something for bedroom/office use.
Very impressive! She literally replicated some of today's most expensive air purifiers..
Except she didn't because it's not a HEPA filter which still won't protect you from your biggest fear.
I don’t have any fears… frankly
I just appreciate creativity in all its manifold forms…
@@heckoffcommie4182you are supposed to get hepa filters for this 😊
There is a 99.9...% chance you know it, but it's just too good: 01:02 into the video:..."and you also need duct tape..." ... do you do know that 1970 on Apollo 13 the square CO2 scrubbers of the Service Module had to be fitted to the circular scrubber interfaces of the lunar module, and that the improvised adapter was made airtight with duct tape? The guys wouldn't have survived without this duct tape contraption! I am convinced; if mankind makes it through the next two centuries, it will be because of paperclips, duct tape and improvisation😉
Duct tape is like The Force in Star Wars, it has a light side, a dark side and holds the universe together.
Yes!! Thanks for this simple/ effective DIY tutorial!
Unsurprising and yet surprising this isn’t more popular of a video.
I love humanity 😂 just wish this ingenuity wasnt driven by nightmare scenarios
Thank you for showing us how to build.
Made 1st one & live in Northern California- lots of smoke from forest fires. It lasted 1-1/2 years.
I use Tyvac tape: holds better.
And put a card shroud on top.
Made 2nd one last spring.
They work wonderfully.
*Tyvek
Your comment made my mind to go for it.
Thanks for sharing your experience.
Brilliant and simple
Can you put gaskets between the Lasko fan and the filter box and use a large clamp to hold it(with wood screws) so that cleaning of fan is a lot better?
I think I have an idea of putting extra wooden brackets for reliability plus Pre-filter pad wrapped around the air filter.
Everyone downing this as not being effective- you haven't looked at the supportive data online that clearly shows otherwise.
Lol aged like milk. Coof is 0.125 microns and attaches to aerosols, this will do nothing. You'd know that if you were able to critically think for yourself and you didn't live in an echo chamber. Just get another booster lol.
@heckoffcommie4182 you're acting like a judgemental asshat. You couldn't be further from the truth but go ahead and feed your narcissistic ego.
How long does this last? I live in a VERY dusty desert area
My cat is going to try to sit on this.
My cat sat on the filters even Before I made the thing.
Two thumbs up with a snap! Sadly, we are reminded that haters are going to hate while doers do.
Dumb.
I think using a high pressure duct fan would work wonders with this filter setup
Would it blow the unit apart?
NASA Study shows house plants can purify the air too.
Peace Lily really good option for that
Plants can only filter chemicals in the air. They do nothing for dust and actual particles in the air, so you should do both mechanical filtering and plants.
Most important instruction is the direction of the fan airflow. So in this makeshift model, the air flows straight up as the fan is turned on?
Yes
Hi all! Any inputs about using lower grade air filters? Here in Indonesia, the 1 MERV-13 air filter will cost almost the same with buying the factory made air purifier.
You can stack up 2 or 3 lower end filters and get similar results.
@@Tyrone-Ward thank you very much for the response.
How long do the filters last?
6 months in this setup
Which way should the fan point in the filter
Outward
What does the shroud do?
It covers up unfiltered holes through which dirty air could get into the box
No you’re completely wrong. Air comes out the top.
Why should the pleats be vertical?
I think to add strength and structural integrity to hold the fan up over time. There's no vertical strength from the pleats if they're horizonal--they'd just fold over.
Can anyone explain why does the direction of the filter pleats matter?
it doesn't. Pleats are soley for increasing surface area of filter.
Neither does "making sure there are no gaps/leaks". Gaps would result in some small percentage that would have no discernable bearing on something that has to run for hour(s) to clean (the air thats near the fan).
You may be right about the direction but not about the gaps
Is the fan blowing into the box or blowing away from the box?
Blowing away. Sucking into the box through the filters which leads all 4 filters filter the sucked air.
Good question! To clarify, plug the fan in, turn it on, and see which side of the box fan is blowing air towards you. That side will have to face up. Essentially, the fan will be blowing up towards the ceiling. Therefore, what is happening within the box that has been creating is a suction that is going out through the box's ceiling through the fan. So, the fan will blow facing up and the circulation of airflow towards the ceiling. All the nasty dusty stuff is getting sucked into the box from all sides, then getting expelled from the box through the top. Bless you!
Not to rain on this parade, but a diy 2 filter set up is possible in fan and filter standing triangle set up. Costs only 2 filters as opposed to four with almost same amount of set up.
I was going to ask why not just one filter attached to the back of the fan?
That would not pull dust from all areas & therefore not as efficient
No words
Why does every video they do they use a large fan and karge filters.
White duct tape might be better for aesthetician reasons
You live in a black & white world. They make many colors of duct tape.
why does it need too be sealed around the fan? I imagine the air would purify the same
So that the air is pulled through the filters rather than through gaps around the fan.
Does this actually work well?
Not for what she's claiming it to do. But it will work for things 1.0 microns and larger.
I’m not sure which side of the fan faces up or down.
Exactly.
Good question! To clarify, plug the fan in, turn it on, and see which side of the box fan is blowing air towards you. That side will have to face up. Essentially, the fan will be blowing up towards the ceiling. Therefore, what is happening within the box that has been creating is a suction that is going out through the box's ceiling through the fan. So, the fan will blow facing up and the circulation of airflow towards the ceiling. All the nasty dusty stuff is getting sucked into the box from all sides, then getting expelled from the box through the top. Bless you!
this can be done with ONE filter taped to the back of the fan. fan then stands normally hiding those hideous filters.
But not as efficient
Well, actually in the winter you do have air being transferred. Heat as we all know seats a lower temperature and as that hot air escapes new fresh air comes in.
Secondly, 99% of homes are not built to a standard which adequately stops that loss. At minum and I say MINUMUM, walls would need to be above R25 and attics above R50 to prevent loss. And if you do have that level of insulation then you also have some sort of mechanical exchange such as an HRV or an ERV.
Many municipalities require that a bathroom exhaust fan run 24/7 to force the ingress of fresh air but this causes it's own issues as the source of that fresh air is often not good (such as from a garage or crawl space).
I am an Architect not a expert on pathogens but I doubt that this would stop any spores from being circulated unless you put a UV light inside it.
You can test your air quality with a flashlight, if it's dark and you see stuff floating in the air then this may be beneficial to you. You can also try the bathroom fan trick to see if that helps with air quality.
Airthings has a good array of devices for measuring air quality.
👍
There is one draw back to your design, You want to pull the air in from the top and force it out through the filters. This way it sucks in the air from above where most of the particulants are located. If you blowing air up it spread those particulants around in the air and they won't make their way down to the filter. I have mine with Arrows pointing out and the fan pulling air in from above down into the box.
Air circulates.
@@jonathaneglinton5378 Air is also stagnate
@@TheMje1963 when there's a fan moving it??
@@jonathaneglinton5378 Yes, study up on your air dynamics, When Negative air meets Positive Air, It creates a stagnate air pocket.
Try using her design again but have it stationed higher up.
Genius! Please, Lena Sun, accept my wholehearted gratitude for this affordable and effective air cleaner! As a recently impoverished by medical maladies San Francisco resident (after having moved here 33 years ago eventually to pay millions in taxes in the interim as a plaintiff's lawyer, formerly an Enforcement Attorney for the US SEC in Washington, DC), it is such a long overdue and wildly welcomed solution to these past 5 years of massive wildfires induced unbreathable air here in practically unaffordable Baghdad-by-the-Bay!
Umm what
The arrow represents the airflow, not the air intake. The blower (fan) should push the air "into" the filter, hence the arrows should be pointed in the outward direction.
No, fan is pulling the air through the filters out to the top, so the arrow should be pointed in just like in the video.
Yes and you would need a ton of them to do it with any sort of effectiveness.
40$ boxfan + 20$ filters x 4. Only 130$ ish mere dollars. 😢
Black Friday??? Birthday gifts?? I know, ughhhhhh inflation 😭
Did you try Walmart ?
@@sarahmcnutt9721 I haven't, but I will! 😅👍👍
These filters aren't 20$ each...
I got decent filters on sale for under $10. This is really designed to get big chunks and allergens, which most filters will do.
dfibyunjy gjcn gbitn$
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How about we stop polluting so we dont have to make this insane box?
Yeah let me just turn off the wind to stop all the pollen, dust, and mold that flies through the air.
Your comment gave me Forest Whitaker eye.
You're so right. Come on everyone, let's stop polluting starting today
Ok great, you first.
Congrats on dumbest comment 👏🏻
That setup is ridiculous. Instead of purchasing a blower worth respecting they used their money on filters that the fan will never completely efficiently clog b/c it's the wrong style. Buy a fan that can pull the air & property clog the filter. If anything this video shows that large companies expect Americans to play with trash.
Scientists invented this box fan design after studying how well different filters remove particles from the air. It was found this setup shown, this fan + filter setup, was as good as machines costing up to like $1k. Google it, "Corsi-Rosenthal box". Why do you think otherwise?
Go back to school
@@1SquidBoy That box-fan is not pressure rated. A high-pressure blower is not crazy expensive.
@@davidwilliams8728 What is the pressure rating of those box-fans? It takes 1wc to clog an air-filter so what wc value do you imagine that box-fan can produce? High-Pressure blowers are not crazy-expensive. Like a Dayton 1TDR6, 1TDT2, or 1TDT7 which have a 1.25 wc rating which do posses the capability to fully clog up the air-filters... unlike the not-rated-for-pressure box-fan.
As a conservative I can confirm this is exactly how I expected Washington Post reporters to be spending their spare time.
Imagine being so brain dead to say something like that. There’s forest fires in Canada that are causing tons of smoke that’s covering the east coast of the US right now. Videos like this are a game changer for times like now where we don’t have $300 to fork over for a air purifier.
I knew it. Conservatives love breathing nasty air
Ok victim
@@kevinboltz6244 ok two brain cells
I'm in a conservative state and living with wildfire smoke everyday from August to October for the last decade.
I know you're sitting in your mojodojocasahouse or whatever getting asthma, but reality is learning to adapt to climate change, and adding a good PM2.5 filter to these really helps not coughing to death.
CRAP - TOO LOUD to sit in the same room. Get a HEPA certified air purifier for ~ $100 at big warehouse stores. 😛😵💫😛
About as useful as the Washington post will ever be
I’m not sure which side of the fan faces up or down.
The fan is blowing air out from the box.
Wondered the same
Seems like it could work both ways? 🤔
Not as efficient the other way & would make fan dirty