My contribution at #DeltaSchoolsAirborne: #Ventilation is a very important factor in the pandemic, it's the primary difference between indoor and outdoor.
Quick definition of #ventilation: Supply clean (outdoor) air, and remove stale (indoor) air. /1
Quick definition of #ventilation: Supply clean (outdoor) air, and remove stale (indoor) air. /1
There are three main types of #ventilation in schools.
1️⃣ Natural (windows only). Unreliable.
2️⃣ Partial mechanical: An exhaust fan draws stale air out. Replacement air enters from other rooms and from the outside through cracks and open windows. /2
1️⃣ Natural (windows only). Unreliable.
2️⃣ Partial mechanical: An exhaust fan draws stale air out. Replacement air enters from other rooms and from the outside through cracks and open windows. /2
3️⃣ Mechanical #ventilation uses fans in a system to provide outdoor air, filter it, and remove stale air. /3
When there is a COVID-19 outbreak, the ventilation system should be investigated. Just like we do for the water treatment system if there's a waterborne outbreak. Send in the engineers!
https://twitter.com/fitterhappierAJ/status/1428070066139058182?s=20/4
For pandemic purposes, using a portable air cleaner is equivalent to providing outdoor air to a classroom.
Lessons learned from Ontario & other jurisdictions for procuring portable air cleaners for classrooms:
- Large capacity. /5
Lessons learned from Ontario & other jurisdictions for procuring portable air cleaners for classrooms:
- Large capacity. /5
As large a Clean Air Delivery Rate (CADR) as possible.
- Low noise. Don't want to interfere with instruction.
- Hold the extras. Avoid ionizers and other technology that adds to the cost, and focus on the air delivery. /6
- Low noise. Don't want to interfere with instruction.
- Hold the extras. Avoid ionizers and other technology that adds to the cost, and focus on the air delivery. /6
- Prioritize portable air cleaner deployment to naturally ventilated and exhaust-only ventilated spaces. May need 2-3 units to approach equity with mechanically ventilated classrooms.
https://twitter.com/DavidElfstrom/status/1426900845455724546?s=20/7
Livestream link for #DeltaSchoolsAirborne on YouTube: /8
Event recording will be reposted later at gospeakupamerica.com/deltaschools /9
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