Thread by @DavidElfstrom

1/ Public Health @cityofhamilton, to stamp this out fast, you should issue an order requiring off-site air-gapped isolation/quarantine accommodation for those with an active infection. cbc.ca/news/canada/ha…

2/ Off-site air-gapped isolation can take the form of individual trailers, or a newer hotel that has been tested for dwelling unit compartmentalization.

3/ We know from decades of building science that there is significant unintentional air transfer between suites, especially in older buildings.

https://twitter.com/DavidElfstrom/status/1379814594529660933?s=20

4/ Also, failure of a centralized exhaust fan can provide a direct linkage between suites.

5/ Please engage with engineers & building scientists to assess buildings in outbreak and to advise on temporary #ventilation and #filtration controls.

6/ Take it from those in the field:

https://twitter.com/markegilmore/status/1392153023196041221?s=20

7/ Here is why exhaust function is critical for older buildings during the pandemic: If one is off, there is a DIRECT connection to all other suites sharing the same shaft, driven by the other exhaust. Air will follow the path of least resistance. Grilles are often clogged.