Elliott Gall

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Elliott Gall

Elliott Gall

@etgall

Associate professor at Portland State University. Working on indoor air quality and building science.

Portland, OR Katılım Ekim 2009
296 Takip Edilen1.1K Takipçiler
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Elliott Gall
Elliott Gall@etgall·
Summer's here and wildfires are looming large - now is the time to prep for woodsmoke events. I'm sharing some of my thoughts on creating a "clean room" in your home using air cleaning, air sealing, and simple strategies for managing indoor emissions: elliott-gall.medium.com/wildfires-and-…
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Elliott Gall
Elliott Gall@etgall·
Thrilled to announce the launch of a 16-credit graduate certificate in Healthy+Efficient Buildings @MaseehCollege @MMEpdx lnkd.in/gBc--vnZ Over 1-year you'll learn fundamentals of HVAC, building energy, indoor air quality + elective. DM me for more info!
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Elliott Gall
Elliott Gall@etgall·
@CorsIAQ @ut_caee Thanks, Rich. So thrilled you were there, and so very glad you sent that letter 17 years (!) ago
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Richard Corsi, PhD, PE (Texas)
Richard Corsi, PhD, PE (Texas)@CorsIAQ·
So proud of my exPhD student Elliott Gall ⁦@etgall⁩, the Technical Chair of #IndoorAir2024. Elliott spoke about his journey to becoming an indoor air researcher & showed a letter he received from me recruiting him as a graduate student ⁦@ut_caee⁩. 🤘🏻🥲
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Elliott Gall
Elliott Gall@etgall·
@Stoffel78179983 @ShivenTaneja True overall. Though the specific claim by the CDC post that motivated this work was that construction quality issues may result in leaks and gaps that impact effectiveness. Our aim was to try to isolate that effect in our study.
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Stoffel
Stoffel@Stoffel78179983·
@etgall @ShivenTaneja "same set of materials" is the key. But in practice people would use wildly different parts. Different designs, different filters and fans.
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Elliott Gall
Elliott Gall@etgall·
The CDC has stated "construction quality...could substantially affect the performance of DIY air filtration units". Our new study on CR Boxes sought to investigate this claim. Main result? 8 novices built 8 different CR Boxes w/ 8% variability in CADR. #fig0010" target="_blank" rel="nofollow noopener">sciencedirect.com/science/articl…
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Elliott Gall
Elliott Gall@etgall·
This was a really fun study, with great work by @brettwstinson and enabled by a fantastic summer undergrad Amity Deters, who will be presenting this work @IndoorAir2024!
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Elliott Gall
Elliott Gall@etgall·
Finally, we modeled a scenario where a newly-built CR box is immediately deployed, e.g. to a bedroom during a wildfire smoke event. Across AER 0.1-1 /h, CR box significantly reduces PM2.5 while there was a short period of elevated BTEX due to off-gassing from tape.
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Elliott Gall
Elliott Gall@etgall·
@ParentMishmash Yes, unit D/S1 was a CR-Box air cleaner made with carbon impregnated filters. Not very effective. We have since tested some other filters that, on their own, have higher single pass removal efficiency such that we'd expect higher BTEX CADRs.
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Elliott Gall
Elliott Gall@etgall·
Glad to share our recently published study in ES&T Air evaluating 13 different air cleaners for PM and VOC removal under wildfire smoke conditions. We evaluated 13 different commercial and DIY air cleaners in a test chamber w/ pine needle wildfire smoke challenge
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Lazarus Long
Lazarus Long@LazarusLong13·
@CorsIAQ @JimRosenthal4 @DavidElfstrom @amandalhu @CleanAirCrewOrg @sri_srikrishna @cleanairkits @JoshuaCAgar @edsuom (and more) The only time I have seen the CR box defeated. But a defeat is just a challenge. Any sorbents that can be added in DIY fashion to up the VOC CADR?
Elliott Gall@etgall

We also developed a method for evaluating VOC CADRs, reporting benzene, toluene, and C8 aromatic CADRs. Commercial units with relatively large masses of sorbents were the only units with meaningful CADRs

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@linseymarr @virginia_tech @VirginiaTechCEE @CorsIAQ @MaseehCollege @MMEpdx @ChemDelphine @arthurmcchan