#diy filter

[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

[thefirsthogokage]

If you're in an area that is suffering from wildfire polluted air, I just saw this on Twitter:

Bonus:

Here's a site I found that can tell you how to make these:

Edit: There have been some extra pointers (about open sources of water in the home, and I believe some other things) in the reblogs, so I highly recommend taking a look at the notes of this post!

Also: Cloth masks are NOT sufficient. Use KN95s or N95s!

[covid-safer-hotties]

Reference preserved in our archive (Daily updates!)

TL;DR: Corsi-Rosenthal Boxes deliver quality air filtration at upwards of 30% higher air exchanges than comparable HEPA filters on the market. Build 'em for covid. Build em' for wildfire smoke. Build 'em for allergies. Build 'em to clean the air.

Abstract Filtration performance of do-it-yourself (DIY) box fan filters deployed across a university campus was assessed over an academic year. Four DIY air filters were constructed from box fans and air filters with a minimum efficiency reporting value (MERV) of 13 and deployed in four spaces (two laboratories that include sources of particles and two offices). They were operated 9 hours daily with a programmable timer and were continuously monitored with power meters. Particle concentrations in the spaces were continuously monitored with low-cost nephelometers. The particle size dependent clean air delivery rate (CADR) and single pass filtration efficiency for each box was measured in a laboratory before deployment and every 10 weeks, for a total of five measurements over 40 weeks. We find that these DIY box fan filters maintain robust performance over time, with each air filter maintaining at least 60% of its initial CADR at the end of the 40 week study even with daily operation in environments with modest particle concentrations. CADR values for particles of 1.0–3.0 μm optical diameter averaged 34% higher than CADR values for 0.35–1.0 μm particles, aligning with MERV 13 filter size-dependent filtration expectations. Reductions in CADR over time were attributed to a reduction in filtration efficiency, likely due to a loss of filter electrostatic charge over time. There was no strong indication that increased resistance due to particle accumulation on filters appreciably decreased flow rates over time for any of the fans. The long-term robustness of DIY box fan air filters demonstrates their validity as a cost-effective, high performance, alternative to portable high efficiency particulate air (HEPA) filters.

[faitsansorganes]

many are asking this

[harriswalter004]

Ever wondered why your energy bills keep climbing or why the air in your home feels stuffy, no matter how much you clean? The culprit might be hiding in plain sight—your HVAC air filter. Most people think replacing it is just another chore, but pros know it’s the secret to a healthier home and a happier wallet. More Info: https://texasclimatepros.wordpress.com/2024/12/03/hvac-air-filter-replacement-hacks-5-secrets-every-homeowner-should-know/

[bobai-bnd-bhe-buns]

i put as many accessories on as possible lol, and tried it out with earlier diy shirt and outfit

i love to wear this to school but stupid dress code of polos and jeans

(yes these photos have filters)

[thatonebabybat]

I think cybergoths and cyberpunks who wear those big decorative gas masks should consider putting voice changers in them. just for funsies.

[bearotonin-international]

Hello team, there's a lot of smoke from wildfires in my area right now and it sucks. I could really do with some silly baby bears in my life today ❤

we're sorry to hear that friend. stay indoors, wear a mask, and do your best to stay safe (psst. here's a DIY air filtration system you can make on the fly) we hope you and everyone else in your area and in the wildfires path & smoke path stay safe and we hope this ridiculously silly babies can help make things a little more bearable 💙

[turtlesandfrogs]

heyyy I seem to remember that you've written some solid diy posts on air filters and I wondered if you had any handy? you've made the cube air filter right or am I confused?

I didn't make it myself, but the design is called a Corsi-Rosenthal box:

And it's awesome. We've not sprung for making a whole cube(but will this year), but even just a single filter on a box can makes such a difference. It's helped so much when we've had really bad air quality.

[cutestvampire]

Hi I'm a mermaid sea witch type thing. 💚💙💚💙💚💙💚💙💚💙💚💙💚💚💙💚💙💚

[mmmmalo]

I have a new creative process for book writing that's proving fruitful and my head's clearer than usual now that I've figured out I have allergies and taken measures to mitigate them. Good times

[quaranmine]

always a fun time at work when i have an excuse to engage in my favorite environmental topic (while i was out of the office i missed a presentation on wildfires so now i am watching the recording)

[stormynoelart]

Portland, OR

Spring 2024

[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! 💪😷✨

[biohazardousgeodez]

yaoi

[swagpr1ncess]