The diverter is the 1st picture- the UV lamp is in the 6 round duct.
The 6 round duct is capped at the end and has 2) 3 pipes teed into the 6 header, and are a ft long, so the UV light travels inside the piping, to below the humidifier. So there is very little if any UV light emitted to the humidifier area.
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