Corsi-Rosenthal Foundation (US)
@crfoundationus.bsky.social
Improving human health by promoting clean indoor air and supplying air purifiers to those in need.
https://corsirosenthalfoundation.org/
https://corsirosenthalfoundation.org/
Pinned
Hear how frequent illness and poor air quality posed major problems for students at Red Rock Elementary, and how Corsi-Rosenthal Boxes boosted their health and ability to learn.
Learn more at:
CleanAirK12.com
CorsiRosenthalFoundation.org
#CRBox #CleanAirK12
Full Video:
youtu.be/dUYLPUfkv0g
Learn more at:
CleanAirK12.com
CorsiRosenthalFoundation.org
#CRBox #CleanAirK12
Full Video:
youtu.be/dUYLPUfkv0g
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
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
November 13, 2025 at 3:33 PM
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
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
🥹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
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
November 5, 2025 at 4:09 PM
🥹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
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
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?⤵️
⬆️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?⤵️
October 30, 2025 at 11:23 PM
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?⤵️
⬆️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?⤵️
Reposted by Corsi-Rosenthal Foundation (US)
Please post a photo of your Corsi-Rosenthal Box if you are decorating one or more for Halloween.
@crfoundationus.bsky.social
@crfoundationus.bsky.social
October 30, 2025 at 3:58 AM
Please post a photo of your Corsi-Rosenthal Box if you are decorating one or more for Halloween.
@crfoundationus.bsky.social
@crfoundationus.bsky.social
Reposted by Corsi-Rosenthal Foundation (US)
Please help out the Corsi-Rosenthal Foundation, it's already done so much good in the world!!
In our short existence, The Corsi-Rosenthal Foundation has issued 58 grants providing healthier indoor air to 30,000 ppl.
The Foundation aims to substantially increase these benefits to under-resourced schools over the next several months.
Please consider helping us: givebutter.com/buildabox2025
The Foundation aims to substantially increase these benefits to under-resourced schools over the next several months.
Please consider helping us: givebutter.com/buildabox2025
Build a Box Campaign
Help Us Bring Clean Air to More Classrooms
givebutter.com
October 26, 2025 at 10:31 PM
Please help out the Corsi-Rosenthal Foundation, it's already done so much good in the world!!
Reposted by Corsi-Rosenthal Foundation (US)
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
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
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
Build a Box Campaign
Help Us Bring Clean Air to More Classrooms
givebutter.com
October 23, 2025 at 10:28 PM
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
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.
Such creativity.
The young ones continue to inspire us, and motivate us to do better to protect them.
My daughter made these on her own when she was 8ish… the real Corsi boxes are fun to build and really quite effective .. @crfoundationus.bsky.social
October 25, 2025 at 12:15 AM
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.
Such creativity.
The young ones continue to inspire us, and motivate us to do better to protect them.
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
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
Build a Box Campaign
Help Us Bring Clean Air to More Classrooms
givebutter.com
October 23, 2025 at 10:09 PM
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
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
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!
The youth are fired up about IAQ.
And we are here for it!
October 22, 2025 at 8:15 PM
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!
The youth are fired up about IAQ.
And we are here for it!
Reposted by Corsi-Rosenthal Foundation (US)
directions for filtering indoor air
You can access these charts on our website, here: corsirosenthalfoundation.org/apply/
Click on Step 1: Identify the need for Corsi-Rosenthal Boxes and you'll see the same charts.
(as always, not medical advice. Chart estimates ceiling height of 9ft.)
Click on Step 1: Identify the need for Corsi-Rosenthal Boxes and you'll see the same charts.
(as always, not medical advice. Chart estimates ceiling height of 9ft.)
Apply - Corsi-Rosenthal Foundation
Dedicated to providing cleaner safer air for all.
corsirosenthalfoundation.org
October 9, 2025 at 3:23 PM
directions for filtering indoor air
Reposted by Corsi-Rosenthal Foundation (US)
Hope this is the start of many more schools (*+ daycares) using air filters, in UK + beyond. One option: @crfoundationus.bsky.social filters are inexpensive and EFFECTIVE. We need to protect children + those who care for them. This works.
@mark-carney.bsky.social
x.com/SadiqKhan/st...
@mark-carney.bsky.social
x.com/SadiqKhan/st...
Sadiq Khan on X: "Cleaner air is coming to London’s classrooms. St Mary’s Primary is one of the first to get air filters funded by City Hall - 200+ more schools will follow soon ⬇️ https://t.co/vIG47FK6Ts" / X
Cleaner air is coming to London’s classrooms. St Mary’s Primary is one of the first to get air filters funded by City Hall - 200+ more schools will follow soon ⬇️ https://t.co/vIG47FK6Ts
x.com
October 17, 2025 at 8:39 PM
Hope this is the start of many more schools (*+ daycares) using air filters, in UK + beyond. One option: @crfoundationus.bsky.social filters are inexpensive and EFFECTIVE. We need to protect children + those who care for them. This works.
@mark-carney.bsky.social
x.com/SadiqKhan/st...
@mark-carney.bsky.social
x.com/SadiqKhan/st...
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/
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/
New research alert! “Do-It-Yourself Air Purifiers: Educator Attitudes and Perceptions in a K-12 Public School District” Read more to learn about the @crfoundationus.bsky.social box and its use in a Connecticut school district: www.sciencedirect.com/science/arti...
October 9, 2025 at 11:02 PM
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/
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/
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
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
October 9, 2025 at 3:22 PM
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
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
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
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
September 18, 2025 at 5:05 PM
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
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
“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...
Read how Safe Streets Wichita used our grant process to build CR boxes. www.communityvoiceks.com/2025/08/01/d...
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 ...
www.communityvoiceks.com
September 17, 2025 at 12:30 AM
“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...
Read how Safe Streets Wichita used our grant process to build CR boxes. www.communityvoiceks.com/2025/08/01/d...
🥳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/
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/
September 12, 2025 at 4:27 PM
🥳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/
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/
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...
🔥🚒🧑🚒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...
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…
www.avfire.org
September 8, 2025 at 2:53 PM
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...
🔥🚒🧑🚒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...
💥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/
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/
September 4, 2025 at 3:39 PM
💥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/
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/
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...
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...
August 26, 2025 at 11:15 PM
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...
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...
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!
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!
August 18, 2025 at 9:26 PM
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!
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!
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...
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...
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,
www.kake.com
August 13, 2025 at 6:10 PM
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...
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...
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.
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.
August 2, 2025 at 12:02 AM
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.
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.
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.
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.
August 1, 2025 at 2:46 PM
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.
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.
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.
@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.
July 30, 2025 at 11:44 PM
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.
@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.
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 $$ so we can get clean air in as many classrooms as possible. Donate here: corsirosenthalfoundation.org/donate/
We are working hard to get ready for back-to-school season! Please consider donating $$ so we can get clean air in as many classrooms as possible. Donate here: corsirosenthalfoundation.org/donate/
July 24, 2025 at 2:46 PM
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 $$ so we can get clean air in as many classrooms as possible. Donate here: corsirosenthalfoundation.org/donate/
We are working hard to get ready for back-to-school season! Please consider donating $$ so we can get clean air in as many classrooms as possible. Donate here: corsirosenthalfoundation.org/donate/