I narrowed my choice down to one installer who will be installing a Trane XL16i and a Trane A/H. He also will be installing a Trane Perfect Fit 5" media filter (not the Clean Effects). I then asked about the installation of a UV ligtht system using a two bulb system with separate bulbs - 16". I then asked about placement of the the UV bulbs and he wanted to install both of them stacked vertically with about 12" between the bulbs in the plenum between the coil and the media filter. I asked about installing one of the UV bulbs above the coil and the other UV bulb in the return plenum between the media filter and the coil. He wouldn't install the UV bulb above the coil because he claimed it would destroy/deteriorate the coil (fins).
I read various posts on this forum and the consensus seems to have a UV bulb above the coil. Should I now interview differnt HVAC companies to find one that agrees with putting a UV light above the coil? Is acceptable to install the UV lights as he proposed?