Blue-Tube UV® improves indoor air quality by killing airborne mold, bacteria, viruses, and allergens. It also keeps the interior of the air system cleaner (the cooling coils in particular) which saves on costly coil cleaning services and also extents the life of the air system.
https://www.freshaireuv.com/assets/assets-public/literature-residential/TUV-BT-BROC-ALT.pdf