@CIBSE_NatVent I have run the case on our estimator at docs.google.com/spreadsheets/d…
- Note ventilation rate is relatively high, most schools don't meet it
- Leads to CO2 = 1720 ppm, while some of your colleagues in the UK say it is fine if it is < 5000 ppm
Vent rate for 5000 ppm is 1 l/s/p, NOT 5
- Note ventilation rate is relatively high, most schools don't meet it
- Leads to CO2 = 1720 ppm, while some of your colleagues in the UK say it is fine if it is < 5000 ppm
Vent rate for 5000 ppm is 1 l/s/p, NOT 5
@CIBSE_NatVent With 5 l/s/p, adding the RELATIVELY SMALL cleaner with CADR = 100 l/s (ACH = 2.4 on cell B31) the risk goes down 30%
With an EXPONENTIALLY growing disease, that's a lot, because it is 30% off EACH GENERATION. I.e. compound interest
With an EXPONENTIALLY growing disease, that's a lot, because it is 30% off EACH GENERATION. I.e. compound interest
@CIBSE_NatVent With the "barely acceptable according to some UK experts" case with 4999 ppm CO2 (~1 l/s/p), then adding that smaller air cleaner reduces the risk 45%.
I would definitely prefer to have my son in a class with the cleaner than without the cleaner
I would definitely prefer to have my son in a class with the cleaner than without the cleaner
@CIBSE_NatVent Now, let's consider a more properly sized air cleaner. E.g. the ones I donated last year for my son's class gave ACH_cleaner = 4.5
then the risk decreases by 60% at 4999 ppm CO2, and by 44% on the default case with 1720 ppm CO2
DEFINITELY worth it IMHO
then the risk decreases by 60% at 4999 ppm CO2, and by 44% on the default case with 1720 ppm CO2
DEFINITELY worth it IMHO
@CIBSE_NatVent So for your poll the answer is >> 100 LESS virions inhaled for realistic scenarios
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