Scam
WHY UV LIGHTS IN HVAC SYSTEMS ARE A SCAM - Blue National HVAC
The HVAC UV lights your technician or HVAC servicer mention are more or less a scam.
Why? They’re touted for their ability to destroy mold spores, harmful bacteria, and viruses that work their way into your air supply, so they’re said to improve your indoor air quality and keep you safe from infection, allergy symptoms, and other medical issues associated with breathing them in.
However, the bulbs used in most residential systems are severely underpowered, don’t work quickly enough to kill stuff in the air that’s circulating through your ducts, and they typical aren’t installed in your ductwork, so they aren’t even meant to treat the air.