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Dec 11 • 9 tweets • 4 min read
If you read this, you'll see that it matches the recs in our Lancet @CommissionCovid report on "The #FirstFour Strategies Every Building Should Pursue".
🧵
Lancet: Commission building systems (give them a tune-up)

WH: "verify proper ventilation in federally owned buildings"
Lancet: improve ventilation

WH: "Providing tools and guidance documents for improving ventilation"
Lancet: Upgrade to MERV-13 filters

WH: "Established MERV-13 filters as minimum"
Lancet: Use portable air cleaners, if needed

WH: "Schools can use funding provided through the American Rescue Plan to improve ventilation in schools...portable air cleaners" (amongst other things)
This new across-agency focus on IAQ goes beyond the #FirstFour that we recommended, and represents and incredible advancement of #HealthyBuildings principles across the Fed Gov't. They are walking the walk.

Links to reports in next posts in the thread
FACT SHEET: DEPARTMENTS AND AGENCIES COMMIT TO CLEANER INDOOR AIR ACROSS THE NATION

whitehouse.gov/ostp/news-upda…
The Lancet Covid-19 Commission, Task Force on Safe Work, Safe School, and Safe Travel
----
The First Four Healthy Building Strategies Every Building Should Pursue to Reduce Risk from Covid-19
----
covid19commission.org/safe-work-trav…
The Lancet Covid-19 Commission Task Force Team👇

//END//

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Joseph Allen Profile picture
Dec 8
Excellent news ASHRAE will release ventilation targets in 6 months. Also, no reason to wait until then to act. Two resources from our Lancet Task Force

1. Proposed ventilation targets for airborne infectious diseases
2. First four strategies every building should pursue now
🧵
1. Proposed Non-infectious Air Delivery Rates (NADR) for Reducing Exposure to Airborne Respiratory Infectious Diseases
2. The First Four Healthy Building Strategies Every Building Should Pursue to Reduce Risk from Covid-19
Read 5 tweets
Joseph Allen Profile picture
Dec 7
I have been a long-time critic of ASHRAE failing to set health-based standards (thread), so I'm delighted by the news today that they will set new ventilation targets for airborne respiratory diseases. They should be applauded for taking this action.
Read 16 tweets
Joseph Allen Profile picture
Nov 30
Not sure who needs to hear this at this point (a lot of you…), but… N95s are better than surgical masks.
🧵
All masks work.

N100 > N95 > surgical > mask
(Yeah, there’s such a thing as N100)
Read 6 tweets
Joseph Allen Profile picture
Nov 27
Guess what affects a pilots ability to fly “advanced maneuvers”, including taking off w/ strong cross wind, departure stalls, and upset recovery?

—> air quality in the cockpit

Our study: hsph.harvard.edu/news/press-rel…
Here's an example from our study of how CO2 in the cockpit impacts likelihood of pilots failing 'advanced maneuvers'.

Rejected takeoff (1 engine inoperative)
If you're curious, here are some of the other maneuvers we tested, and what they look like in terms of flight path
Read 6 tweets
Joseph Allen Profile picture
Nov 23
Important article by ⁦@laurameckler⁩ on COVID’s toll on students.

—> Students who learned from home fared worse than those in classrooms

—> High-poverty schools did worse than those filled with middle class and affluent kids

🧵 washingtonpost.com/education/2022…
—> older students, who have the least amount of time to make up losses, are recovering much more slowly

—> setbacks that were more severe the longer students stayed in virtual school.
—> The more weeks of remote learning, the less students learned during that time-period

—> Hispanic and particularly Black students grew academically more slowly than expected, as did students with disabilities
Read 9 tweets
Joseph Allen Profile picture
Nov 21
The Science Applications Team of the ASHRAE Epidemic Task Force developed ventilation guidance last winter but ASHRAE never released it.

That guidance finally saw the light of day in our Lancet report on ventilation targets.

Many, many thanks to those scientists for sharing.
🧵 Image
2-2-3. Based on Floor Area Plus Minimum ASHRAE Ventilation Requirement

The Science Applications Team for ASHRAE Epidemic Task Force developed an approach for recommending NADR in buildings based on building floor area.
This guidance was developed during the pandemic but was never formally published or released by ASHRAE. They recommended that in addition to the minimum ASHRAE ventilation requirements, building owners or managers provide an extra 0.75 cfm per square foot (3.81 L/s/m2) of NADR...
Read 6 tweets

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