Difference between revisions of "Eth0:2025 Autumn air purifiers"
From Eth0Wiki
(Created page with "Active air filtration is being looked into by the orga. Meanwhile, let's check how many visitors can bring their own purifiers along. {|class=wikitable ! Name !! Description...") |
|||
| Line 15: | Line 15: | ||
=== How much ventilation is needed? === | === How much ventilation is needed? === | ||
| − | The WHO has indicated that for gatherings, you need '''at least''' 10 dm³/s/person, which is '''36 m³/h/person of ventilation'''. Real ventilation is best, because it also gets rid of the CO2 and moisture. Unfortunately, many (most) buildings are equipped with substandard ventilation systems, and the standards (like the Dutch Bouwbesluit/Bbl) themselves do not meet the criteria. | + | The WHO has indicated that for gatherings, you need '''at least''' 10 dm³/s/person, which is '''36 m³/h/person of ventilation'''. Real ventilation with fresh outside air is best, because it also gets rid of the CO2 and moisture. Unfortunately, many (most) buildings are equipped with substandard ventilation systems, and the standards (like the Dutch Bouwbesluit/Bbl) themselves do not meet the criteria. |
If sufficient actual ventilation is not available, or just for extra risk reduction, additional air cleaning can be installed using (portable) air purifiers with HEPA filters. For scrubbing bio-aerosols like covid or flu, a lesser filter (e.g. G7 ≈ MERV13) would suffice, but most air off-the-shelf purifiers have much higher grade filters (which is unfortunate because with a lower grade filter, the same fan could have a higher airflow!). | If sufficient actual ventilation is not available, or just for extra risk reduction, additional air cleaning can be installed using (portable) air purifiers with HEPA filters. For scrubbing bio-aerosols like covid or flu, a lesser filter (e.g. G7 ≈ MERV13) would suffice, but most air off-the-shelf purifiers have much higher grade filters (which is unfortunate because with a lower grade filter, the same fan could have a higher airflow!). | ||
Note: proper ventilation is necessary to enable self-protection with masks, and can reduce a super-spreader event to a much lower number of infections. It can strongly reduce the number of long distance infections, but it's less effective at very short distances. Ventilation is just one part of a comprehensive approach. | Note: proper ventilation is necessary to enable self-protection with masks, and can reduce a super-spreader event to a much lower number of infections. It can strongly reduce the number of long distance infections, but it's less effective at very short distances. Ventilation is just one part of a comprehensive approach. | ||
Revision as of 21:07, 5 February 2025
Active air filtration is being looked into by the orga.
Meanwhile, let's check how many visitors can bring their own purifiers along.
| Name | Description | CADR in m3/h | Remarks |
|---|---|---|---|
| Juerd | TaoTronics AP-003* | 400 | Will move it to the (shared) bedroom at night |
| Juerd | Another TaoTronics AP-003 | 400 | |
| you? | ... | ... |
How much ventilation is needed?
The WHO has indicated that for gatherings, you need at least 10 dm³/s/person, which is 36 m³/h/person of ventilation. Real ventilation with fresh outside air is best, because it also gets rid of the CO2 and moisture. Unfortunately, many (most) buildings are equipped with substandard ventilation systems, and the standards (like the Dutch Bouwbesluit/Bbl) themselves do not meet the criteria.
If sufficient actual ventilation is not available, or just for extra risk reduction, additional air cleaning can be installed using (portable) air purifiers with HEPA filters. For scrubbing bio-aerosols like covid or flu, a lesser filter (e.g. G7 ≈ MERV13) would suffice, but most air off-the-shelf purifiers have much higher grade filters (which is unfortunate because with a lower grade filter, the same fan could have a higher airflow!).
Note: proper ventilation is necessary to enable self-protection with masks, and can reduce a super-spreader event to a much lower number of infections. It can strongly reduce the number of long distance infections, but it's less effective at very short distances. Ventilation is just one part of a comprehensive approach.
