BERG@IIT @built_envi

The Built Environment Research Group advances research in energy and air quality in buildings at Illinois Institute of Technology. Tweets by Brent Stephens. built-envi.com Chicago, IL Joined April 2012

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BERG@IIT @built_envi

4 years ago

Solid advertisement for building science here! Good time to bring up the James Brown blower door video courtesy of @EnergyVanguard youtu.be/Xsp3yCxoYOA

Chris Hayes @chrislhayes

4 years ago

Solid advertisement for building science here! Good time to bring up the James Brown blower door video courtesy of @EnergyVanguard youtu.be/Xsp3yCxoYOA

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BERG@IIT @built_envi

4 years ago

Another round of tests published, this time on a WINIX 5500-2 unit. PlasmaWave(R) technology appears to generate large amounts of negative ions, as measured, but doesn't impact CADR much: built-envi.com/wp-content/upl…

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BERG@IIT @built_envi

4 years ago

Thanks to @parhamazimi_87 for kicking off this big field project as a postdoc and to Insung Kang for finishing it up!

Parham Azimi @parhamazimi_87

4 years ago

Thanks to @parhamazimi_87 for kicking off this big field project as a postdoc and to Insung Kang for finishing it up!

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Parham Azimi @parhamazimi_87

4 years ago

Finally, our first paper from a series of to-be-published papers related to the impacts of mechanical ventilation on the IAQ in residences is out and available in @STOTEN_journal sciencedirect.com/science/articl…

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BERG@IIT @built_envi

4 years ago

We tested a version of a Corsi-Rosenthal box with MERV 13 filters: built-envi.com/wp-content/upl… CADR intuitively increased with particle size: 166 CFM for 0.09-1 µm 321 CFM for 0.5-3 µm 464 CFM for 5-11 µm More air cleaner testing here: built-envi.com/portfolio/air-… @JimRosenthal4 @CorsIAQ

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IIT Architecture @IITArchitecture

4 years ago

Architect and building scientist Irmak Turan to join College of Architecture faculty: arch.iit.edu/life/architect… Turan comes to Illinois Institute of Technology from the Massachusetts Institute of Technology.

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BERG@IIT @built_envi

4 years ago

We are thrilled as well!!! Looking forward to working with you!

Irmak Turan @ituran

4 years ago

We are thrilled as well!!! Looking forward to working with you!

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Elliott Gall @etgall

5 years ago

Wondering what that "99% reduction in 1 h" air cleaner is actually doing in your space? We made the air cleaner efficacy investigation tool (ACE IT) to help evaluate often opaque performance data. tinyurl.com/air-cleaner-ef… w/ @built_envi @mheidarinejad @ChemDelphine @marwa_zaatari

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BERG@IIT @built_envi

5 years ago

Read our new paper testing a popular ionizer product here. In collaboration w/ great partners @ChemDelphine @etgall @mheidarinejad and our teams. TLDR: not much particle removal, removal of some VOCs (but generation of others), and no NOx/O3 emissions. Hope the data are useful...

Ian Cull @IAQnerd

5 years ago

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Ian Cull @IAQnerd

5 years ago

People are concerned about Bipolar Ionization devices producing ozone. You should be MORE worried by this new @built_envi study that found a unit not removing a statistically significant amount of particles! Isn't that a purpose of an "air cleaner"? sciencedirect.com/science/articl…

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BERG@IIT @built_envi

5 years ago

Well said 👇

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BERG@IIT @built_envi

5 years ago

Surprisingly little experimental data out there on such a straightforward question: how much ventilation do you provide by opening windows in schools? @IAQnerd made CO2 tracer test measurements in a local school (in winter, Chicago)

Ian Cull @IAQnerd

5 years ago

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BERG@IIT @built_envi

5 years ago

Finally got around to updating our August blog post on masks a few hours before this update from CDC 🙃 built-envi.com/what-kind-of-m…. Need to update again (and again)

Linsey Marr https://www.threads.net/@linseycmarr @linseymarr

5 years ago

Finally got around to updating our August blog post on masks a few hours before this update from CDC 🙃 built-envi.com/what-kind-of-m…. Need to update again (and again)

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Shelly Miller, PhD @ShellyMBoulder

5 years ago

“Those of us in this field have been arguing for decades that we need to pay attention to the indoor environment, and we’re thrilled people are recognizing it’s important. But how to get from here to there will take an infusion of investment,” wired.com/story/the-next… via @WIRED

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Richard Corsi, PhD, PE (Texas) @CorsIAQ

5 years ago

Great story w/ some great insights and quotes by @ShellyMBoulder, @IAQinGWN, @WBahnfleth, @stephensbrent. My sense is that the general public is definitely cluing in to the importance of the air they breathe indoors. Leveraging now & post-pandemic is important.

Shelly Miller, PhD @ShellyMBoulder

5 years ago

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Jim Rosenthal @JimRosenthal4

5 years ago

@apoorva_nyc The questions I always ask about BPI are: 1. If they emit ions that destroy pathogens in the air, how do they not attack human lung tissue? and 2. What assurances are there that chemical reactions do not create byproducts and/or particles? Never received a good answer to either.

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Brent Stephens @stephensbrent

5 years ago

Thanks for your work on this! I would also add that air cleaners purported to kill coronavirus really need critical assessment of manufacturer claims. Standards are week/nonexistent. Test reports plagued with weak science. Potential for chemical/particle byproducts is high.