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on these ultra violet lights that are installed in ducts. I've seen them made to be mounted in the return duct with a turbulator to increase air exposure so it can kill germs that fly by, and I've seen them made to be mounted in the supply plenum with a bulb over each side of the evaporator coil drain pan to kill mold in the drain pan. What is the reality of these appliances. Where should they be mounted and what is their real benefit? I have a customer asking about them. (She saw them for sale in Home Depot. Arrrrrgh!) Thanks in advance WW
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