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UV lights in AC coils? Don Wiss 03-01-2008
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Posted by a on March 3, 2008, 8:13 am
Noon-Air wrote:
>> On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "hallerb@aol.com"
>>
>>> my point was that with the heat on any mold will dry out and die.
>> Nope. Under stress they form spores to be blown to other more
>> hospitable places for regrowth.
>>
>> On UV lamps I once saw a section of them in the Dollar Store. They
>> never stocked them again. But these lamps are available in novelty
>> stores that sell psychedelic posters and paraphenalia. Perhaps UV
>> lamp bulbs are cheaper there than at a HVAC place.
>
> Wrong kind of UV... wrong light band and temperature
>
>

Indeed - those are "black lights" and won't kill anything.

a

AppliancePartsPros.com, Inc.
Posted by Dr. Hardcrab on March 3, 2008, 5:45 pm

> Noon-Air wrote:
>>> On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "hallerb@aol.com"
>>>
>>>> my point was that with the heat on any mold will dry out and die.
>>> Nope. Under stress they form spores to be blown to other more
>>> hospitable places for regrowth.
>>>
>>> On UV lamps I once saw a section of them in the Dollar Store. They
>>> never stocked them again. But these lamps are available in novelty
>>> stores that sell psychedelic posters and paraphenalia. Perhaps UV
>>> lamp bulbs are cheaper there than at a HVAC place.
>>
>> Wrong kind of UV... wrong light band and temperature
>>
>>
>
> Indeed - those are "black lights" and won't kill anything.

It killed a lot of my brain cells back in the early 70s!!!

No wait.......that wasn't the black light..........

Posted by a on March 3, 2008, 6:33 pm
Dr. Hardcrab wrote:
>
>> Noon-Air wrote:
>>>> On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "hallerb@aol.com"
>>>>
>>>>> my point was that with the heat on any mold will dry out and die.
>>>> Nope. Under stress they form spores to be blown to other more
>>>> hospitable places for regrowth.
>>>>
>>>> On UV lamps I once saw a section of them in the Dollar Store. They
>>>> never stocked them again. But these lamps are available in novelty
>>>> stores that sell psychedelic posters and paraphenalia. Perhaps UV
>>>> lamp bulbs are cheaper there than at a HVAC place.
>>>
>>> Wrong kind of UV... wrong light band and temperature
>>>
>>
>> Indeed - those are "black lights" and won't kill anything.
>
> It killed a lot of my brain cells back in the early 70s!!!
>
> No wait.......that wasn't the black light..........

I was thinking of that when I posted! Killed a lot of good trips too!

a

Posted by on March 3, 2008, 8:57 pm
UV does have it's applications.

However, It is expensive for the normal, low maintenance homeowner.
UV does have a 1/2 life, something the manufactures have not
advertised so well in the residential market. A fact that some
contractors themselves have not embraced, I wish I had taken pictures
of their faces when I had them actually read the literature.

Evaporator Coil (specifically pan) properly installed should not have
standing water so this is not my concern with mold. In fact, it
should not be taken into my consideration for recommending a UV
system. (But what can I say, I push routine maintenance too.)
However, I do live in a rain forest where RH is extremely high. It is
the health of the occupants that determine if I recommend an UV system
and I do take the time to explain 1/2 lifes, etc....

I find that a properly installed system with a healthy family do not
require the addition of UV, there are other, cost effective systems
that will keep IAQ well within acceptable limits for a majority of
households.

But here is a question for you techies: Ever try to tar your
environmental test equipment outside within "environmental norms" to
find the house way below (meaning lacking even the slightest trace of
natural pollutants such as asbestos or CO found in the area?--and no
UV installed?)

Posted by a on March 4, 2008, 1:31 pm
becauseofjunk@mailcan.com wrote:
> UV does have it's applications.
>
> However, It is expensive for the normal, low maintenance homeowner.
> UV does have a 1/2 life...

OK - The Honeywell products are not *that* expensive, and UV is used in
*many* water treatment systems and they are not that expensive... UV
half-life? No. You mean a radioactive half life expressing the rate of
decay? That's like saying light has a half-life, or radio waves have a
half-life - they do not. Half life is an expression of the rate of decay
of a substance (or a biological system) - not the MTBF or service life of a
product. Maybe you mean the phosphors that are used to create the UV
radiation has a half-life?

All things wear out - UV bulbs included, but what I like about some of the
the Honeywell units is that they can sense when the air is moving and then
turn on - extending bulb life past the usual one year.

a

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