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David Elfstrom
DavidElfstrom
#COVIDCO2 readings in an Ottawa classroom. Never reached a steady state. At 3152 ppm every breath contains 7.2% of other people's breath . #DontShareYourAir #OntedClassroom has below 0.4 air changes
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1. Thank you @normsworld and @TCDSB for undertaking this #COVIDCO2 study. Some observations below (Thread)https://twitter.com/normsworld/status/1361317932412915712 2. The sensor used was a ELSYS ERS CO2, a good choice because it also
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1/ #VENTILATION is a key factor in #SafeSeptember for #onted. In this thread I'll cover:My immediate 3 asks of @sfleece and @fordnation A suggested room-by-room assessment and implementation methodologyWho to
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CBC Marketplace and UofT's Dr Jeffrey Siegel tested 3 samples of 5 models of air purifier, including the DIY box fan with MERV-11 filter, which was better than the Dyson
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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-ai
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New preprint from J Lednicky & al: Isolation of SCV2 from air in a car driven by a COVID patient with mild illness. (Jan 15 2021).While virus detected at all
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