#corsi rosenthal box

[lilhawkeye3]

some friendly advice as new areas of the country start having long-term wildfire smoke problems:

Don’t do extended exercise outside. If possible, don’t do extended work outside.

Shower once you’re back inside to wash the particles off your skin/hair. This helps to keep you from inhaling it when out of the smoke.

Hot showers and steam help sooth inflammatory airways (nose/throat)

Wear an N95 mask when outside for extended periods to help keep from inhaling smoke. Look at what size particles and how much the mask will protect against (ie 95% vs 99%).

Get an air filter for your office/room/house. They’re in the $50 range online (price May vary in person). If you can’t get one, look into how to make a Corsi-Rosenthal box (box fan, two air filter frames and lots of duct tape).

If you have an A/C (window or central air), turn the fan from “auto” to “on”. This will make sure your air is still being filtered even when the cooling part of the system is not on.

Drink water. (I mean you should try to do this anyways)

Important to note: you may feel side effects slower than others. You may feel them quicker than others. Sore throat, sinus infection, upper respiratory infection, itchy eyes, pink eye, exhaustion, difficulty breathing— these are all common side effects of prolonged smoke exposure.

The dangerous part is that in areas of high concentration, the particles are small enough to be absorbed into your bloodstream. So please, do what you can to help protect yourself and friends/family. Even when you aren’t feeling it, it’s affecting you.

signed, an Oregonian in the Midwest with permanent lung damage from wildfire smoke.

[laurellynnleake]

Just swapped out the filters on our 1st Corsi-Rosenthal cube, and what a difference! Dusty old filter above, minty fresh one below.

This particular filter box spent 10+ months on low inside our house, catching tons of wildfire smoke, PM2.5, and COVID-19 aerosols, as well as pollen, dust, and mold. Glad all that's on THERE and not in our lungs!

I highly recommend building your own CR box for your home, school, work, mutual aid meet ups, etc. All you need is 4 MERV-13 filters (sold at most hardware stores), a 20" box fan, scissors, cardboard, and duct tape.

It ends up costing about $75-100 - much cheaper and performs a lot better than a lot of fancy air purifiers. Building it with 2 people takes about an hour (mostly to measure and cut out the weird shroud thing), and swapping in new filters is much faster.

Check out the Clean Air Crew website to get started on your own! We protect each other! 💪😷✨

[pipzeroes]

The tune is based, with permission, on “How To Build A Fence” by Nova Scotia singer/songwriter Bob Snider.

How To Build A Corsi-Rosenthal Box

It’s time to clear the air Cause COVID is still there… And if you want a cheap machine that will cancel tox- -ic pathogens in the air, Well then you oughta hear ‘bout the Corsi-Rosenthal Box.

First you get your fan, Keep the box that it came in You’ll need it for the floor; Now get filters, count 'em, four. What rating? MERV-13. The hardware store will know what you mean. As always, you’ll be stuck, Without your tape for duck. Now add a box-cutter, you're on your way to warding off the pox! This is everything you need to build a Corsi-Rosenthal Box.

With the filters, build the shell In order to build it well Look for the big arrow; It shows how the air should flow. First filter you begin With the arrow pointing in Then build a filter fence By butting up against Tape it up so every filter interlocks Now you’ve got four strong walls for your Corsi-Rosenthal Box.

Don’t worry there’s not much more But you’ve got to make a floor That shouldn’t come as a shock Since that’s why you kept the box So cut your square to fit Tape it on the top of it Turn it upside down and then You’re ready for the fan Now with all you’ve done you’ll find that you’re approx- -imately one or two steps from done your Corsi-Rosenthal box

Before you do the rest, You’ve got to give the fan a test You'll feel like such a jerk, If it turns out not to work, When you’ve used up all that tape To attach it to the crate And covered gaps and slits With tape and cardboard bits

Not to complicate, just make a little slit in the tape So the cord can escape Or else the thing will never go Make a little slit then cut another bit Also with a slit They fit Opposite And overlap them now you’re sealing soundly so– You’re sure it’s only through the filters air can blow– Also— They take out dust and pollen and smoke Which is good to know Tape the corners of the fan just to increase the rate of flow– Oh! Congratulations you just built one of the building blocks, For being safe to respire (Ahhh…) Now sit back and admire Your lovely little Corsi-Rosenthal Box

[bandomfandombeyond]

ha. fuckin HA.

one of the bitches who contributed to getting me kicked out of the "queer-oriented" "radical" camp for advocating that people mask and carrying around my CR Box CAUGHT COVID at it.

the Lord rebukes!!!!!!!

[mxlabradorite]

AIR QUALITY BAD

Hey kids, a bunch of North America is on fire again, and the air quality in the places catching the smoke from weather patterns is somewhere between gangrenous and dogshit.

Please wear a mask when you're outside! (You should still be wearing them inside, but I can only say that so many times. Just kidding, I'm gonna keep saying it.)

If the air in your living space is getting smoky, see if you have the materials or can get them for a Corsi-Rosenthal Box!

NYC had literally the worst air quality on the planet yesterday.

You can check on the air quality in the US here, and in Canada here.

Stay safe!

[fishelfe]

To be safer...

[shadow27]

How to build a Corsi Rosenthal Box

If you’re in an area with a lot of wildfire smoke consider building a Corsi Rosenthal Box for about $50 worth of materials and a few minutes work

[pandemic-info]

The PC Fan #CorsiRosenthalBox

I'm now a convert. PC fans from now on. I built two PC fan CR boxes and I'm addicted. Using PC fans might be the most important innovation to portable air cleaners since the invention of the original CR box. These are unbelievably quiet.

Also smaller than a regular CR box.

[artemisiatridentata]

shoutout to uh.

all the good people over on #COVIDisAirborne twitter experimenting with Corsi-Rosenthal box builds w/ different fans and filters and testing their efficiency and posting lists of all the materials they used and DIY videos!! they are saving my life fr.

if you've never heard of a CR box: basically it's a cheaper (and often better) DIY version of a HEPA air filter, which can cost several hundred dollars. The purpose of a CR box is to filter viruses, wildfire smoke, pollen, and other harmful particles out of the air, and provide clean air in exchange.

Your average CR box is made out of a box fan + air filters/furnace filters + duct tape. comparatively really cheap to build; I did mine for about $90 ($35 box fan + 5 Honeywell MERV 13 20x20x1 filters + duct tape) (4 filters for the build itself + an extra in case of damage).

Here's an article w/ links to videos and other articles on how to build a basic one out of a box fan + 4 filters.

If you don't have the space in your home for a full-size one, you can use PC fans + 2-3 filters for a slimmer box form!! I'm currently gathering materials to make this guy so I can replace the bulky box fan CR build that's currently in my room:

as well as this one for my living room, where I and my roommates spend a lot of time:

If you're really tight on space, you could make an even tinier CR box, which unfortunately filters less air, but is still better than nothin':

anyways. I'm rambling but CR boxes have been proven to help prevent infections if someone in your household comes down w/ covid. They save lives and they're cheap to build. Please consider building one for your home, and/or asking your school or workplace if building some for your common spaces is a possibility!! As I'm working indoors this winter (and no-one masks except for me), I'm planning to ask my boss if they'd be willing to use company funds to build one or two of these.

Happy building! :-)

[clean-air-covid-safe]

Kits range from 150 USD to 160, taxes, shipping and other fees not included.

[sarahthecoat]

where i am, the filters and the box fan are each in the neighborhood of $20, so if $100 for the full setup is too much all at once, the fan and a single filter taped to the intake side, is a fine start. the fan should last years, especially if you can oil the axle between the motor and the blades. i use sewing machine oil, which comes in a little plastic bottle with an extendable tube nozzle. i get a drop of oil in there if i notice the fan seems louder than i remember, and that often quiets it down.

to anyone in the areas impacted by the wildfire smoke, my #1 biggest piece of advice as someone whos been dealing with wildfire smoke in the NW united states for years, is build yourself a Corsi-Rosenthal Cube

they perform as well as expensive HEPA air cleaners, and are comparatively VERY inexpensive. all you need is a box fan, 4 air filters, a piece of cardboard, and some duct tape!!!!

i think it took us maybe a half hour to put ours together, if that, and we replace the filters every 3 months. it's really made a HUGE difference, both when the air quality is bad, but also with our allergies

[samhainnight]

 Covid hospitalizations for seniors in CA,  NY and other states now exceed levels for BA.2 BA.5 and Delta, says expert Eric Topol. See his substack below.

[library-graffiti]

Corsi-Rosenthal Box Assembly

The ingredients all together.

Air filters taped together with the air flow pointing inward.

Sealed the bottom with a piece of cardboard (from the box the fan came in).

The fan I bought has an inconveniently placed electric cord, but no worries! Duct tape can fix that!

Quality Control Officer stopped by.

QCO circled the whole thing - making sure I had stopped up any holes with more duct tape.

All done and sitting in its place.

Whole thing took maybe 45 minutes, and that's because I stopped and took pictures. Also because I had to retape one side because I didn't get it exactly square.

[theculturedmarxist]

Poor ventilation in classrooms can increase the risk of infectious disease transmission, such as COVID-19, because it allows respiratory aerosol particles that may contain viruses to accumulate. Air purifiers can effectively reduce transmission rates in community spaces, including classrooms, because they increase the air change rate in the room and reduce particle concentrations. In this study, we investigate the effectiveness of Corsi-Rosenthal Boxes (C-R Box) in reducing particle concentrations in active, occupied classroom settings. A C-R Box is a do-it-yourself, cost-effective alternative to commercial air purifiers built from a box fan, four readily available filters, cardboard, and duct tape. We collected measurements of coarse (particles with diameters > 2.5μm) and fine (particles with diameters 0.5μm - 2.5 μm) particle number concentrations and PM2.5 (particles with diameter < 2.5μm) mass concentrations. Specifically, we compared measurements in occupied classrooms before and after we turned the C-R Boxes on. In our testing, C-R Boxes reduced fine particle number concentrations by 56-91% and PM2.5 mass concentrations by over 70% after we turn on the C-R Boxes. We also simulated velocity profiles in the classrooms with running C-R Boxes showing mixing throughout the classroom ensuring that all air can encounter the filter.

[verschlimmbesserung]

Here's the link for normal round fans

Practical tip for those dealing with wildfire smoke now: you can make a very effective air filter for a reasonable amount of money using a box fan & one of those filters meant for your furnace.

Also, I've managed to pick up 2 of the box fans for very cheap/free from yard sales. Make sure you get a filter rated for wildfire smoke, I think this one cost about $20.

These make a huge difference in the indoor air quality.

[pandemic-info]

Enjoy Clean Air While You Drive with the Mini-Mini Corsi-Rosenthal Box - Tex-Air Filters