Thread by @HuffmanLabDU

1/ Here's a quick bite (< 2.5 minutes) of overview on infectious respiratory aerosol emissions, #ventilation, and using #CO2 monitors as a tool in the fight against COVID & for healthy indoor air.

Thx to @KateM_NYC @YahooNews for the interview. #COVIDCO2
news.yahoo.com/co-2-monitors-…

2/ I recently gathered several interesting stories from recent CO2 measurements as well as a simple example of how I had fun measuring the ventilation rate in my house.

Peruse #COVIDCO2 for many more examples.

https://twitter.com/HuffmanLabDU/status/1335999080938364932

3/ Measuring #CO2 to estimate ventilation rate is a quick way of approximating the amount of "rebreathed air" (the portion of air you breath that has already been in someone else's lungs).

See thread by @CorsIAQ for good details here.

https://twitter.com/CorsIAQ/status/1315550913315045376

4/ And while inexpensive #CO2 sensors are relatively new, the concept of rebreathed air is amazingly old. E.g. this comment is from 1893. Take a lesson from history!

Page via @DavidElfstrom @EnergyVanguard:

5/ Lots of ways to measure #CO2 and estimate if ventilation is well-matched to the room you're in.

- Buy a NDIR CO2 monitor (<$200)
- Mount at home, school, or bring w/ you
- Be wary if >800 ppm

One add'l resource of tips/links, by @jljcolorado et al.:
tinyurl.com/faqs-aerosol

6/ And to really learn about #ventilation, #IAQ, and indoor #CO2, follow others that know a lot about these things & post on Twitter frequently:

e.g. @polsiewski @Poppendieck @CorsIAQ @DavidElfstrom @jksmith34 @CathNoakes @built_envi @ShellyMBoulder @kprather88 @citlanx