The discussions reflect high support and interest in DIY air cleaners, with examples like mentions of a peer-reviewed study confirming their effectiveness, practical tips on design improvements, and comparisons of cost versus commercial options. The tone is informative and optimistic, highlighting both empirical evidence and real-world applications, which underscores a shared belief in their significant potential for improving indoor air quality during wildfire seasons.
AgreementModerate agreement
The majority of discussions support the effectiveness of DIY air filters like the Corsi-Rosenthal box, citing studies and practical experiences.
InterestHigh interest
Participants show high interest, referencing detailed research, studies, and tutorials on building and optimizing these DIY solutions.
EngagementModerate engagement
Many posts actively discuss specifics such as filter types, design modifications, and performance metrics, indicating thoughtful engagement.
ImpactModerate impact
The emphasis on cost-effectiveness and proven research suggests a recognition of these DIY solutions' potential for meaningful impact on indoor air quality during wildfire events.
Abstract in brief
The study examines how different DIY air cleaner designs, made from a box fan and furnace filters, perform in reducing wildfire smoke, with the main measurement being the clean air delivery rate (CADR).
The results show that simple modifications like increasing fan power, using larger or multiple filters, or adding a shroud can significantly boost CADR, making these DIY solutions more effective.
However, the effectiveness decreases as filters get loaded with smoke, highlighting the importance of frequent filter changes during wildfire events to maintain air cleaning performance.]
The particulates from the SoCal fires are extremely toxic.
And there are online videos on how to make a simple air filter.
1 -
youtu.be/PNdAGwIzAns?...
2-
youtu.be/uYSf-OsRtIk?...
I am afraid the article you reference does not give the full details of the actual study. The study found that electret filters were very effective at removing wildfire smoke. (The #corsirosenthalbox was the best!) The study is here:
https://t.co/AQ9lBUccfK https://t.co/7bTuk6UhZF
@jon_szpakowski @CorsIAQ Corsi-Rosenthal Boxes can outperform HEPA units on noise, CADR, cost, and even overall performance
e.g., for wildfire smoke
https://t.co/Y4GuqquvIE
@JasonM98282978 If you want to extend an olive branch you could share these to help them establish safe indoor air quality
https://t.co/AC5zNLC80m
https://t.co/Y4GuqqtXT6
Aug 22, 2023 · 7 likes · 1 share · 5,868 followersView post →
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maty || @
@nauscopio · X
@dupuisj Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment
https://t.co/NXUQ0iD6ac
Dec 3, 2022 · 5 likes · 2,537 followersView post →
CQ
Covid Ecoles Quebec
@CovidEcoles · X
Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment - Holder - 2022 - Indoor Air - Wiley Online Library https://t.co/rQfyJfGEDr
Dec 3, 2022 · 4 likes · 6 shares · 12,811 followersView post →
Building a air purifier system for your home is easy and affordable. This video provides step-by-step instructions to create an efficient DIY air cleaner using common materials, supported by scientific research on…
This video explores how DIY air cleaner designs using box fans and MERV 13 filters can effectively reduce wildfire smoke. It discusses modifications like increasing fan power and using multiple filters to enhance…
@four4thefire C-R box effectiveness is real. Cost is $80 vs a $400 high-end air cleaner for competitive CADR. We use air cleaners year-round for dust/allergies so we have dedicated Blue Air units. But for an inexpensive solution for fire smoke you can’t beat a C-R box. https://t.co/sXawNQTT8K
May 12, 2025 · 2 likes · 8,251 followersView post →
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Jan Kirsch, M.D., M.P.H.
@drjanicekirsch.bsky.social · Bluesky
The particulates from the SoCal fires are extremely toxic.
And there are online videos on how to make a simple air filter.
1 -
youtu.be/PNdAGwIzAns?...
2-
youtu.be/uYSf-OsRtIk?...
@MarshallImprov1 @CDCDirector You are neglecting buoyancy perhaps? I’m not sure.
In any case, several studies show that CR boxes work well, & I recommend considering your point addressed & move on to support.
https://t.co/ho12UTVViX
https://t.co/DxesFS3Dgm
https://t.co/Y4GuqquvIE
https://t.co/BOYPPQyR4s
@moss_sphagnum What size filters are you using for the single-filter units?
Upping to thicker filters (e.g. 4") will increase CADR while still a smaller footprint than a 4-filter CR-box.
See this US EPA study for some data on the improvement (1" -> 4", 2x CADR): https://t.co/083x7AYlGU
@jon_szpakowski @CorsIAQ Corsi-Rosenthal Boxes can outperform HEPA units on noise, CADR, cost, and even overall performance
e.g., for wildfire smoke
https://t.co/Y4GuqquvIE
I am afraid the article you reference does not give the full details of the actual study. The study found that electret filters were very effective at removing wildfire smoke. (The #corsirosenthalbox was the best!) The study is here:
https://t.co/AQ9lBUccfK https://t.co/7bTuk6UhZF
@postcarbonsteve These #CorsiRosenthalBox air filters are effective for cleaning the air indoors:
https://t.co/AC5zNLC80m
Easy to procure parts, easy to build, and they work!
https://t.co/Y4GuqqtXT6
Aug 23, 2023 · 2 likes · 5,868 followersView post →
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AnnieRN
@ann_mcnitt · X
RT @PoeBrianL: @JasonM98282978 If you want to extend an olive branch you could share these to help them establish safe indoor air quality…
Aug 22, 2023 · 1 share · 4,754 followersView post →
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Dr. Brian Poe
@PoeBrianL · X
@JasonM98282978 If you want to extend an olive branch you could share these to help them establish safe indoor air quality
https://t.co/AC5zNLC80m
https://t.co/Y4GuqqtXT6
Aug 22, 2023 · 7 likes · 1 share · 5,868 followersView post →
DP
Dr. Brian Poe
@PoeBrianL · X
@Raffi_RC @atiyeahthoughts Have you ever seen these #CorsiRosenthalBox DIY air filters?
https://t.co/AC5zNLC80m
They can even outperform HEPA filters for smoke:
https://t.co/Y4GuqqtXT6
They are a great opportunity for young people to interface with both climate and health in an actionable way
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 4,195 followersView post →
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ciara
@ciarasteele16 · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 51 followersView post →
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Trina McMahon
@quendi · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 2,812 followersView post →
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JP(ol?), morsel of foreboding
@odlogan · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 370 followersView post →
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Shirley Turnbull
@TurnbullShirley · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 1,855 followersView post →
KM
kathleen morris
@MorrisKat6999 · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 685 followersView post →
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Richard L. Weiss
@RichardLWeiss · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 2,730 followersView post →
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MIKE OHARA
@MIKEOHA29305220 · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 80 followersView post →
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Woodie
@DerekWoodie · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 486 followersView post →
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fizzy
@wafmctfa · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 326 followersView post →
SA
Sara Avery
@SaraAvery · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 1,501 followersView post →
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Nathalie
@NatLauter · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 13, 2023 · 56 shares · 1,492 followersView post →
DP
Dr. Brian Poe
@PoeBrianL · X
@nedgar I’m with you there. The hands-on aspect grounds everything more.
Plus CR boxes were found to be more effective than HEPA for smoke removal in this study:
https://t.co/Y4GuqqtXT6
I think there’s applications and room for both. Especially while clean air tech deployment rises.
Jun 13, 2023 · 1 like · 5,868 followersView post →
KN
K3LLYB33N
@K3LLYB33N · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 2,916 followersView post →
FP
Fried Egg Pundit
@friedeggpundit · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 121 followersView post →
DP
Dr. Brian Poe
@PoeBrianL · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 5,868 followersView post →
AH
Alex&her;
@Alexgorithmic · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 1,636 followersView post →
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revealynn.bsky.social
@LynnHonsberger · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 849 followersView post →
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BethBPersist
@BethH_persist · X
RT @CRBoxFoundation: A peer reviewed study confirming that a MERV-13 based Corsi-Rosenthal box can outperform HEPA based air cleaners v wil…
Jun 12, 2023 · 56 shares · 1,976 followersView post →
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David Elfstrom
@davidelfstrom.bsky.social · Bluesky
When to change the filter on DIY #CorsiRosenthalBox? Holder et al (https://onlinelibrary.wiley.com/doi/10.1111/ina.13163) showed that performance degradation depends on contaminant: Dust reduces airflow. Smoke kills electrostatic properties. @JimRosenthal4 @joeyfox85 @CorsIAQ
@JimRosenthal4 @vera_tenacious @moss_sphagnum @MichaelSchwandt @chrischirp @VCHhealthcare @CDCofBC @CorsIAQ @ShivenTaneja @ncceh Thx @JimRosenthal4 for sharing this recent study too! https://t.co/rjWAiIwtq7
“Large ⬆️ in CADR could be obtained by using a shroud (40%), using a 4″ thick filter (123%), using two filters in a wedge shape (137%), or using 4 filters in a Corsi-Rosenthal (CR) box design (261%).” https://t.co/wiG5rYIhhZ https://t.co/bYSC3XMjhs
Jan 24, 2023 · 4 likes · 2 shares · 1,772 followersView post →
HP
HealthyBuilds West Palm
@NanoSafe1 · X
Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment
https://t.co/Zb92ygDdhf
Fire season 2023 may be a ways off, but it is never to early to start thinking about mitigation. Check out this pub in Indoor Air where they test the efficiency of different DIY air cleaner set ups.
@UM_CPHR @cdpheapcd @CSUVetMedBioSci @IdahoDEQ
https://t.co/aTURSPLlev
RT @CovidEcoles: Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environme…
Dec 3, 2022 · 6 shares · 1,128 followersView post →
CQ
Covid Ecoles Quebec
@CovidEcoles · X
Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment - Holder - 2022 - Indoor Air - Wiley Online Library https://t.co/rQfyJfGEDr
Dec 3, 2022 · 4 likes · 6 shares · 12,811 followersView post →
ΚU
Κασσάνδροσ Full-time Future Forecaster until 2027.
@JeanMichelFleur · X
@MarcoSanchezGue @VentilaEscuela @azucenau #CorsiRosenthalBox tienen la más alta CADR, reducida por filtros sucios.
Holder, A. L., et al. (2022).
Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment.
Indoor Air, 32(11)
https://t.co/lRvicbNGJ6 https://t.co/HH7xFzdwyA
Κασσάνδροσ Full-time Future Forecaster until 2027.
@JeanMichelFleur · X
#CorsiRosenthalBox tienen la más alta CADR, reducida por filtros sucios.
Holder, A. L., et al. (2022).
Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment.
Indoor Air, 32(11)
https://t.co/lRvicbNGJ6 https://t.co/EaeMoUTlNo https://t.co/RAQFluqDr9
Κασσάνδροσ Full-time Future Forecaster until 2027.
@JeanMichelFleur · X
#CorsiRosenthalBox’s high clean air delivery rate reduced by dirty filters.
Holder, A. L., et al. (2022).
Impact of do‐it‐yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment.
Indoor Air, 32(11)
https://t.co/lRvicbNGJ6 https://t.co/lADhA4hskk https://t.co/UrwUJGJeCd
@CorsIAQ @LibDemPatrick Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment
https://t.co/NXUQ0iU9cc
@karkaytan Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment
https://t.co/NXUQ0iD6ac
Dec 3, 2022 · 2 likes · 2,537 followersView post →
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maty || @
@nauscopio · X
@dupuisj Impact of do-it-yourself air cleaner design on the reduction of simulated wildfire smoke in a controlled chamber environment
https://t.co/NXUQ0iD6ac
Dec 3, 2022 · 5 likes · 2,537 followersView post →
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新潟大学健康増進医学講座 | Niigata-shi Niigata
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＃CKD ＃新潟大学 ＃健診 論文リンクhttps://doi.org/10.1111/nep.14170. No photo description available. 蒲沢 ...
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