📍HEADS UP: I’m going to be amplifying key scientists who work in AEROSOL transmission, because critical right now.
💡First—HOW TO MEASURE ROOM’s AEROSOL INFECTION RISK? You first need to measure a room’s VENTILATION RATE. Dr. @jljcolorado has a calculator + cheap $159 method!
💡First—HOW TO MEASURE ROOM’s AEROSOL INFECTION RISK? You first need to measure a room’s VENTILATION RATE. Dr. @jljcolorado has a calculator + cheap $159 method!
2) Professor Jimenez has developed an easy to use calculator for aerosol transmission risk for a room. You don’t know how safe a room is to be in unless you do air flow calculations with environmental engineering formulas. Luckily there is a calculator. docs.google.com/spreadsheets/d…
3) EXCERPT: Can the ventilation rate be estimated with a portable CO2 meter?
In research, we measure the ventilation rate using a “tracer release” experiment. We release a puff of an inert, non-sticky gas that we can measure with high time resolution.
In research, we measure the ventilation rate using a “tracer release” experiment. We release a puff of an inert, non-sticky gas that we can measure with high time resolution.
4) We then see measure that tracer decays, and the rate of decay is the ventilation rate. CO2 is a useful tracer, as are various volatile organic compounds. CO2 has a big advantage in that humans are a ubiquitous, free source of it .
5) “The problem is how to do this “at home.” The research CO2 analyzers that I have used to do this can do this cost several thousand dollars, which is prohibitive for most situations. However, I have bought and tested a $159 CO2 monitor. And it works well.” 
6) Using such a device you can figure out the airflow value needed to do aerosol risk calculation in just a few hours at home or for any room! Just have a notebook & simple calculator! Great assignment for bored school kids! And learn to prevent #COVID19 😃medium.com/@jjose_19945/h…
