ClearFlite sells Austin Air and Aeris Aair Air Purifiers and replacement filters for them on GSA Advantage and on this site. All units come complete with filters. Advantage prices are lower according to the ClearFlite Inc GSA contract (GS-07F-5479P) but only federal and some state agencies can use Advantage.
Advantage Links to Air Purifiers for Covid-19:
note: Austin Air HM450 is also suitable for Covid-19 as well as gases and odors