re: UV bulbs in HVAC ducts - do they work?

quote:

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Our HVAC technician came out yesterday for our fall/winter service check-up. The blower motor for our upstairs unit is leaking some fluid, so they will be coming back out to replace it.

He mentioned that they are currently running a "deal" on installing UV lights in systems to help with bacteria, mold, pollen, etc. Cost would be $591 for a double bulb in the upstairs unit, or $823 for a single bulb in the upstairs and downstairs system.

I know that UV light has been proven to kill certain bacteria and fungi, but do they do enough to warrant putting them in the HVAC system? If so, where do these costs line up?

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Waste of money and to actually maintain anti-microbial effects, the bulbs will need to be changed extremely frequently.

In laboratory safety hoods, the UV bulbs are (or should be) tested monthly and are replaced at least every 6 months.