8) But i won’t discuss too much on upper air UV because costs are variable and schools should focus on ventilation and HEPA filters first. And is there funding support? Yes soon in the Biden COVID Bill—$130 Billion for school reopening. https://google.com/amp/s/www.vox.com/platform/amp/policy-and-politics/22276788/covid-relief-bill-congress-stimulus-checks…
Portable HEPA Filter Systems.
1/ The cost of retrofitting EVERY public school classroom in the entire US w/ a portable HEPA air filter w/ CADR = 300 cfm is approximately $1 billion w/ recurring cost of about $300M/yr for replacement filters. To be clear, EVERY single classroom.