Discover and read the best of Twitter Threads about #ventilationequity

Most recents (4)

The air cleaner purchased by @nseducation for schools has a Clean Air Delivery Rate almost HALF of a common retail unit and may create secondary products by reacting with gas phase contaminants in a poorly ventilated room using photocatalytic oxidation #nspoli /1 Guardian Beyond Air F159E: ...
As seen in the photo, it's not running on its highest setting. For #ventilationequity in non-mechanically ventilated classrooms, should be a min 15 CFM per person, or 375 CADR for 25 people, AND at an acceptable noise level. How many per classroom? #DoTheMath! /2
Don't get me wrong, any filtration is better than nothing! But it's a mere band-aid over a gaping wound.
A DIY $120 #corsirosenthalbox will beat the air cleaners purchased by @nseducation AND can be used in STEM lessons! See /3 Screen capture of web site
Read 15 tweets
One year ago, this was my jump into trying to clear the air around school #ventilation (wherein I miss-tagged Ontario Minister of Education @Sflecce) now at 48 tweets.
Photo is a rooftop classroom exhaust fan turned off because it was too noisy.
That fan is used to force infiltration in through cracks in the building envelope and intentionally open windows. It was a valid design for several decades for ~25% of classrooms in Ontario, ~5% are fully naturally ventilated, and the rest have a HVAC system /2
Some of these have been or are being retrofitted to add ventilation with federal flow-through funding. It's about 🇨🇦$43,000 to add a unit ventilator to a classroom, based on AMDSB @yourschools which is ensuring all its schools have mechanical ventilation! /3
Read 8 tweets
Adding a HEPA filter to every @tdsb classroom is #equal, but NOT #equitable.
To approach #ventilationequity, non-mechanically ventilated classrooms need multiple units, in this case three on medium speed.
For justice, @ONeducation must fund capital repairs to @Fix_Our_Schools Equality, Equity, Justice i...
I can't identify the artist for the equality/equity/justice infographic. Thank you for your work!
Read 4 tweets
Top of the fold! Thank you @SaraMojtehedz & @maywarren11 at @TorontoStar bringing school #ventilation & #filtration to the forefront.
I wrote the attached thread on #ventilationequity after the interview. /1
Continuation of the excellent Toronto Star article. /2
To approach #ventilationequity in non-mechanically ventilated classrooms with their ventilated counterparts, would need 3 units of the unit pictured running on Medium speed.
(1) on High: 65 dBA, 250 CFM
(3) on Medium: 60 dBA, 375 CFM /3
Read 5 tweets

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