I read this in December but just now asking.
Do you know what UV light, the brand and model, (might be in the paperwork...pamphlet/brochure that came with the unit) that your AC technician placed in your system? Of course the model he used for your system might depend upon the size of your AC/HVAC but it would be a good starting off point for me. I am interested in it and want to address it with my AC technician.
Yes MAC is everywhere. All we can do is the best that we can do with the tools we have (and can afford) and use good common sense about doing the things we know to do to keep ourselves as well as possible with BE/MAC.
Thanks for your post about your helpful AC technician.
Barbara