Big quiet filter appliance builds/prototypes with big quiet fan https://docs.google.com/document/d/1jMqLlYyqZIlxS1OECqng-gznYJxwWXS-mYVez3LJJ2U/edit?tab=t.0#heading=h.cnpq9dpfpn7y

CADR and noise testing of Lasko 3733 and BQF with various filters: 

https://docs.google.com/document/d/1H9HJ9tA-uKfeqrl3aLlwpRvj8iZj_pog-A7o108mFVA/edit?tab=t.p0d4z1j93a0i