A uv light is supposed to kill bacteria and germs. I installed an inexpensive uv light from Amazon several years ago when we had a peculiar odor coming from the ac that no one could identify. The light eliminated that and we have been remarkably free of COVID, colds and flu. The unit has a magnetic mount and is powered through the drop down transformer inside the ac or optionally the 110/220 line. The light is good for a year and then changed with Amazon replacement. I would recommend the Amazon unit in a heartbeat.
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