Quote:
Originally Posted by Veracity
I am on TEAM-UVLIGHT. It might all be in my head, but it gives me peace of mind knowing (or thinking) that there is no mold blowing through my HVAC. We rented a house that had little maintenance done to the HVAC. It was only a few years old, but the coils were black with mold. So, when we built our new house, we had two UV lights installed by Sunshine within weeks of moving in. Then, during our first 1-year routine maintenance, we asked for a 3rd light, which even surprised the technician because the entire system was spotless. We have now been here close to two years and there is not a speck of mold in our system. Maybe it would have been fine without the light, but after seeing the black mold in our rental, I never want to take the chance of having that mold in my house. So, we probably win the award of the most HVAC UV lighting in the entire Villages (or the people who got scammed the most). LOL. 
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High intensity UV C Lights properly installed on the wet input side will deactivate microorganisms illuminated by the light giving them a bad sunburn.
Trade-off is if regular maintenance is good enough or not vs how often you need to replace the lamps and at what cost?