Read on Twitter
ASHRAE guidance on in-room air cleaners for reducing COVID-19 in the air (Jan 21, 2021)
@ShellyMBoulder
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/1
@ShellyMBoulder
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/1
Stick to the basics of filtration. Beware of some technologies used by portable air cleaners: Ionizers, UV-PCO and other names may claim to remove or destroy contaminants but may convert them to other compounds that may be harmful
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/2
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/2
Good example of sizing a portable air cleaner for a classroom with a MERV-8 filter already present in the HVAC system to achieve 6 air changes per hour equivalent.
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/3
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/3
Consider noise level for a portable air cleaner. Beware of construction-grade air scrubbers as they are usually loud.
Two units operating at a low speed may be quieter than one larger one.
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/4
Two units operating at a low speed may be quieter than one larger one.
Link (PDF): https://www.ashrae.org/file%20library/technical%20resources/covid-19/in-room-air-cleaner-guidance-for-reducing-covid-19-in-air-in-your-space-or-room.pdf
/4
US EPA: Air Cleaners and Air Filters in the Home
Link: https://www.epa.gov/indoor-air-quality-iaq/air-cleaners-and-air-filters-home
/5
Link: https://www.epa.gov/indoor-air-quality-iaq/air-cleaners-and-air-filters-home
/5
Decibel Addition and Subtraction Calculator, to determine total noise level from more than one portable air cleaner
Link: https://www.noisemeters.com/apps/db-calculator/
/6
Link: https://www.noisemeters.com/apps/db-calculator/
/6
Testing mobile air purifiers in a school classroom: Reducing the airborne transmission risk for SARS-CoV-2
J. Curtius, M. Granzin, J. Schrod
medRxiv 2020.10.02.20205633; doi: https://doi.org/10.1101/2020.10.02.20205633
/7
J. Curtius, M. Granzin, J. Schrod
medRxiv 2020.10.02.20205633; doi: https://doi.org/10.1101/2020.10.02.20205633
/7
Don't be like Quebec. /8 https://twitter.com/DavidElfstrom/status/1350275055922642950?s=20
HRAI has easy-to-read guidance on schools
Link (PDF): https://www.hrai.ca/uploads/userfiles/files/2021%2001%20--%20Guidance%20for%20Schools.pdf
/9
Link (PDF): https://www.hrai.ca/uploads/userfiles/files/2021%2001%20--%20Guidance%20for%20Schools.pdf
/9
IAQ & COVID In Commercial Buildings with Dr. Jeffrey Siegel @IAQinGWN. A 1-hour webinar from Jan 26 2021 hosted by @HRAI_Canada /10
BUT you don't need to buy a portable HEPA!
A box fan, packing tape, and MERV-11 filters can beat a high end HEPA, because of the total volume of air it can push and cleans on multiple passes. It isn't pretty but it works. /11 https://twitter.com/JimRosenthal4/status/1346548272719134722?s=20
A box fan, packing tape, and MERV-11 filters can beat a high end HEPA, because of the total volume of air it can push and cleans on multiple passes. It isn't pretty but it works. /11 https://twitter.com/JimRosenthal4/status/1346548272719134722?s=20
