"John Grabowski" wrote in message
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"RBM" wrote in message
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"John Grabowski" wrote in message
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"RBM" wrote in message
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A customer of mine inquired about a UV filter to install in or on a
central AC air handler to kill mold growing inside the cabinet and duct.
Is anyone familiar with these, that can give me any detail on how and
when they are used and work.


*Roy it sounds as though you want ultraviolet lights for inside the
ductwork. I've seen these used in hospitals, but I don't have any
details. I have also seen the ones used on water filtration units
connected to wells. The idea is that the UV light kills bacteria. Try
talking to an HVAC company.


Thanks John, I don't know who initiated this, possibly the HVAC service
company, and the homeowner is trying to get other opinions. From the
homeowner description, it's just going to be some type of UV light
installed in or on the air handlers. The claim is that there is mold
growing inside, and the UV will kill it. I've worked with the ones on
spas, and water systems, but I've never seen anything like this. It
didn't sound like they were going to be installed throughout the duct, as
you describe, which makes sense to me, just something in the blower. He
didn't give me a number, but said it was wicked expensive. A Google
search didn't turn up anything that was convincing to me. I suppose I
should have him get more specifics from the contractor, so I have
something more tangible to look into.


*Roy I'm thinking if there is existing mold in the ducts that a
remediation company should come in and clean first. The Ultraviolet
lights are only placed near the air handler to my knowledge, not
throughout the duct work so they would not do much for anything beyond. I
would think that the source of the mold should also be addressed rather
have something to keep the mold under control. Perhaps moisture is getting
into the ducts and condensing or they are up against a moist surface such
as a basement wall.

OK, I get you. I'm not sure there is actually any mold inside the systems.
It may be the HVAC company needs work. I think the homeowner is skeptical as
well, at least regarding the remediation. This is your garden variety
system, one handler in the attic for the second floor, and one in the
basement for the first floor. The attic is hot and dry, and the basement is
finished and above grade. Both units can't be more than 10 years old, and
neither has the slightest bit of rust externally. I definitely need to dig
deeper and get more info from the homeowner