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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 22/05/2026

APRIL RECAP 🌟 67 CR boxes granted to help provide cleaner air to schools and community spaces. That’s clean air for approximately 6,800 children & community members! Please DONATE to help us continue: https:// corsirosenthalfoundation.org/donate

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 18/05/2026

MARCH RECAP 🩵 59 CR boxes granted to help provide cleaner air to schools and community spaces. That's clean air for approximately 235 children & community members! 🙌 Please DONATE to help us continue: https:// corsirosenthalfoundation.org/donate

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 14/05/2026

FEBRUARY RECAP 21 CR boxes granted to help provide cleaner air to schools and community spaces. That’s clean air for approximately 750 children & community members! 🩵 Please DONATE to help us continue: corsirosenthalfoundation.org/donate/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 12/02/2026

LEFT: 2024 Grant recipients RIGHT: 2025 Grant recipients Last year was a tremendous year of impact for us at the CR Foundation. Check out our full report of 2025 activity: corsirosenthalfoundation.org/about/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 10/02/2026

We don't have any orange smoke, but we do have a particle counter. Watch these PM2.5 levels plummet in this time-lapse video of running CR boxes for 9 min.

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Reposted by Corsi-Rosenthal Foundation (US)

Richard Corsi @corsiaq.bsky.social · 07/02/2026

Liam is amazing. So pleased that the @crfoundationus.bsky.social was able to support his efforts.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 06/02/2026

Great explanation of airborne viruses. CR Boxes can help remove most of these viruses from the air.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 26/01/2026

This is the face of a teacher who is learning how easy (and fun) it is to make a Corsi-Rosenthal Box. Clean classroom air is coming their way! Join the movement: corsirosenthalfoundation.org/donate/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 16/01/2026

Liam, a teenager in North Carolina, reached out to us at the Corsi-Rosenthal Foundation in the fall of 2025. To earn his Eagle Scout award, Liam wanted to build 30 CR Boxes for a local STEM elementary school. What a thrill it has been to watch this project blossom.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 09/01/2026

Another community building CR boxes for schools! “There’s not much that we can do about the air quality outside. But being able to create our own safe haven indoors is what we can do to actually have control and autonomy over our own health.” www.imperialvalleyweekly.com/news/seeley-...

imperialvalleyweekly.com

Seeley School Community Builds DIY Indoor Air Purifiers

SEELEY — In a community where air quality challenges are part of daily life, students, parents and school staff at Seeley Union School District took action this week by learning

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 06/01/2026

🥹🥹🥹 This 2-min video of students across Connecticut building CR boxes in schools is full of: Hope Science Encouragement All the feels Keep advocating for clean air in schools. We're here to help. Shout out to Marina Creed & team! 💪🫶 www.youtube.com/watch?v=KkC9...

youtube.com

UConn Air Quality Initiative

YouTube video by SpiveyCPS

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Reposted by Corsi-Rosenthal Foundation (US)

Richard Corsi @corsiaq.bsky.social · 02/01/2026

The @crfoundationus.bsky.social extends its warmest wishes for peace, joy, and healthy indoor air in 2026!

A DIY air cleaner sits on a table top next to a bottled water. The air cleaner has new white pleated filters and is assembled with blue duct tape.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 31/12/2025

A few highlights from 2025, and our wish for 2026. 🌟We started off 2025 by providing over 1,100 modified CR boxes to those impacted by the LA fires. It was a massive grassroots effort with many people rolling up their sleeves to help during this crisis.

hundreds of CR boxes lined up ready to be transported to LA fire victims.

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Reposted by Corsi-Rosenthal Foundation (US)

our lady of the cow parsley @ladycowparsley.bsky.social · 21/12/2025

Nervous about getting together with family for the holidays? Bring the best present of all, a Corsi-Rosenthal box! Dress it up with a big red bow of course🎁 youtu.be/1aMOtwcmvpo?... @crfoundationus.bsky.social

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Reposted by Corsi-Rosenthal Foundation (US)

Richard Corsi @corsiaq.bsky.social · 28/12/2025

Excellent - A friend gave me a metal Yeti drink cup inscribed with instructions on how to make a CR Box. 😊 @crfoundationus.bsky.social

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 13/12/2025

An uplifting story of the far-reaching impacts of Corsi-Rosenthal boxes: The @crfoundationus.bsky.social sponsored the Healthy Buildings conference in India this year. We provided supplies to build CR boxes. One of the attendees went home & taught their daughter what he had learned ...

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 09/12/2025

People all over the U.S. are coming together to provide clean indoor air for their community. Look at the wonderful folks of Imperial County, CA leading the way. Two ways to join the movement: 1⃣Apply for a grant to build 2⃣Donate: givebutter.com/buildabox2025

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 02/12/2025

$4 provides clean air for 1 student for an entire year. $100 provides clean air for a classroom for a year. We are 15% of the way to our goal of raising $25,000. Please help us provide clean air for more children & teachers. DONATE: givebutter.com/buildabox2025 #GivingTuesday

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 26/11/2025

Our biggest week yet!! We are thrilled to have the resources to approve 7 new grants this week, totaling 275 CR Boxes. That is clean air for approx. 10,000 kids & community members. Please DONATE to help us continue: givebutter.com/buildabox2025

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Reposted by Corsi-Rosenthal Foundation (US)

Tania J. Spencer @taniaspencer.bsky.social · 17/11/2025

What a sweet memory from 2023! ❤️ @crfoundationus.bsky.social corsirosenthalfoundation.org/showcase/pro...

corsirosenthalfoundation.org

Corsi-Rosenthal Box

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 16/11/2025

Just this month, the @CRFoundationUS has received applications for 275 CR boxes to be deployed to 7 schools & community centers. That is clean air for thousands & thousands of people. Please help us meet these needs.🙏🙏 Donate now: givebutter.com/buildabox2025

givebutter.com

Build a Box Campaign

Help Us Bring Clean Air to More Classrooms

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 13/11/2025

More and more people around the world are talking about the importance of clean air! Join the movement and donate today and help us reach our goal of getting clean air to 10,000 students! Donate today: givebutter.com/buildabox2025

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 05/11/2025

🥹Look at our elders keeping their community healthy🥹 This is Air Alliance Houston building CR Boxes. If you are inspired by these folks, please donate so we can sponsor more events like this: givebutter.com/buildabox2025

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 30/10/2025

Is your air cleaner a money suck? ⬆️up front cost ⬆️cost of replacement filters The CR box is a fraction of the cost of other units, with greater efficacy. It just moves SO much air, providing mixing and many more passes through the filters. Can your air cleaner do this?⤵️

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Reposted by Corsi-Rosenthal Foundation (US)

Richard Corsi @corsiaq.bsky.social · 30/10/2025

Please post a photo of your Corsi-Rosenthal Box if you are decorating one or more for Halloween. @crfoundationus.bsky.social

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Brooke @brooklynmarie.bsky.social · 26/10/2025

Please help out the Corsi-Rosenthal Foundation, it's already done so much good in the world!!

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Ginny @ginflo2.bsky.social · 23/10/2025

Please consider donating. As we know this is an indoor pandemic and to give our kids the best chance is to clean the air in the schools using air filters if their IAQ is subpar(which most are 🥺) I have built countless Corsi boxes over these past 5 yrs and they have kept us safer! #CleanTheAirWeShare

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 25/10/2025

Check out these adorable CR box earrings made by an 8yo. Such creativity. The young ones continue to inspire us, and motivate us to do better to protect them.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 23/10/2025

Many of you have been with us from the beginning, as champions for clean air. We have put thousands of CR boxes into schools & community spaces across the country. Help us continue the movement making clean air accessible to all by donating today: givebutter.com/buildabox2025

givebutter.com

Build a Box Campaign

Help Us Bring Clean Air to More Classrooms

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 22/10/2025

This week's top fan is a soon-to-be Eagle Scout who has decided to do his big Eagle Project on building and donating CR Boxes to a local school with data showing poor indoor air quality. The youth are fired up about IAQ. And we are here for it!

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Reposted by Corsi-Rosenthal Foundation (US)

Matt Siegel @mattsiegel.bsky.social · 09/10/2025

directions for filtering indoor air

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 10/10/2025

Research says ... CR boxes are: - effective - quiet - durable - easy to move - not a distraction to teachers or students If you want to get CR Boxes into your classroom, the CR Foundation can give you all the supplies ... for FREE. Apply for a grant today: corsirosenthalfoundation.org/apply/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 09/10/2025

How many CR Boxes do you need for a particular space? Check out our new handy charts to help gauge your needs for: - school settings - residential settings *Notice the guidance is different based on your goals: - mitigating wildfire smoke - mitigating bioaerosols

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 18/09/2025

We are looking forward to participating in this Global IAQ event next week at UN Headquarters in NYC. We will be joining orgs from around the world to address the need for clean indoor air. Register here 🔽 to watch the event from anywhere: bit.ly/461pNPq

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 17/09/2025

“By coming together to build these purifiers, neighbors are taking a meaningful step toward ensuring that children and educators have a safer, cleaner place to learn and grow.” Read how Safe Streets Wichita used our grant process to build CR boxes. www.communityvoiceks.com/2025/08/01/d...

communityvoiceks.com

DIY Air Purifier Assembly to Support Gordon Parks Elementary Academy Wichita

Motivated to help one of Wichita’s most environmentally impacted neighborhoods, Safe Streets Wichita is assembling a coalition of community members, partners and local advocates to help build DIY air ...

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 12/09/2025

🥳The Corsi-Rosenthal Foundation is celebrating the donation of our 2,000th CR Box.🥳 That is A LOT of clean air ... all thanks to your generous donations that allow us to do this work. Thank you! Feel free to join our efforts by donating here: corsirosenthalfoundation.org/donate/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 08/09/2025

Check out these amazing kids teaching 🔥🚒🧑‍🚒fire fighters🔥🚒🧑‍🚒 how to make a Corsi-Rosenthal Box to clean their indoor air. Fire fighters are exposed to horrendous amounts of particulate matter. The students captured 102 pgs of data to analyze! www.avfire.org/red-rock-gat...

avfire.org

Red Rock GATE Project: Corsi-Resenthal Air Purifier Boxes

Avra Valley Fire District has recently hosted the GATE students from Red Rock Elementary School to build and install Corsi-Rosenthal air purifiers at…

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 04/09/2025

💥NEW RESOURCE💥 We're excited to share a new BIG BUILD GUIDE to help those who are building a large quantity of CR Boxes. It's an amazing combination of: - tips - printable instructions - editable files Check it out: corsirosenthalfoundation.org/instructions/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 27/08/2025

Thanks @usepa.bsky.social for including us in the team of Air Cleaning Allies super heroes! Check out their new Activity Book for kids to learn about the importance of clean indoor air and ways to improve IAQ. Give DJ a ❤️!! Download it here: www.epa.gov/system/files...

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 18/08/2025

Want to get [FREE] Corsi-Rosenthal Boxes in your child's school this year? We've created an email you can share with the school principal to make the process easier. You can access it through the link on STEP 2 of our grant process. corsirosenthalfoundation.org/apply/ Please share!

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 13/08/2025

Inspired by our friends in Kansas who are doing amazing work to get clean air in classrooms in Wichita. Grateful to be able to do our part to contribute all the supplies. Check out this news story about their project: www.kake.com/community/lo...

kake.com

Local volunteer groups build air purifiers for students living near 29th and Grove contamination

The air we breathe is what keeps us alive. But when that air is contaminated, it can and will harm us instead. By building air purifiers for a local school,

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 02/08/2025

Tune in to this 11-minute interview with Dr. Richard Corsi on Canadian radio. How a DIY air purifier can help deal with wildfire smoke. @corsiaq.bsky.social Affordability - Accessibility - Efficiency They continue to be our driving values. www.cbc.ca/listen/live-... Pic of the OG.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 01/08/2025

This week's update: 12 CR boxes granted to heat relief and respite centers in the Phoenix, AZ area. @airsupportproject.bsky.social Back-to-school season is upon us. Be sure you are following us to get updates on all our new resources to help kids and teachers have cleaner air this school year.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 31/07/2025

This week's Top Fan is our friends at @airsupportproject.bsky.social . Their VP, Melissa Smallwood, built CR boxes to be placed in heat relief centers around Phoenix, AZ. These cooling & respite centers ease one public health crisis. Happy to minimize the impacts of other crises.

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 24/07/2025

This week's update: 12 more CR Boxes deployed to schools and community centers around the US. We are working hard to get ready for back-to-school season! Please consider donating $$ so we can get clean air in as many classrooms as possible. Donate here: corsirosenthalfoundation.org/donate/

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Corsi-Rosenthal Foundation (US) @crfoundationus.bsky.social · 18/07/2025

This week's Top Fan!! The Ohio Clean Air Coalition recently received a grant from us. They gathered, built, and distributed several CR boxes to public spaces in their community! We are honored to have played a small part in this story.

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