“Mine” was a poor choice of words. I didn’t install a UV light, but I did install an air Ionizer. My point wasn’t clear: asking your HVAC tech for advice, since they service your system, I presume, and may have additional details like install pointers or potential impacts on warranties, etc.

I’m no expert, but I am handy.

I called my HVAC technician before, and he told me to install mine in the chamber after that one. I have one before it splits.

Call your HVAC technician and ask them for over the phone advice. My tech offered to install mine for free on my next service.

I still did mine, and he checked my work and okayed it as “a gold star install.”

Here is a picture after I installed it and before wiring it.

Edit: I don’t have a finished photo, but I will post one on request. I’m too lazy to take a photo and explain why if my wife asks.