I'm replacing my central air conditioner with a much more efficient one. (I
hope Congress restores the $500 tax credit this year!) One of the options I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient one.
(I
hope Congress restores the $500 tax credit this year!) One of the options
I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Figure on about $100 per bulb on replacement costs.....

Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely the
condensate drain pan.

geothermaljones

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient one.
(I
hope Congress restores the $500 tax credit this year!) One of the options
I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient one.
(I
hope Congress restores the $500 tax credit this year!) One of the options
I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils

- "THERE FOR" Improves system efficiency


See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

On Sun, 02 Mar 2008, "Dr. Hardcrab" wrote:

Don Wiss wrote:
I'm replacing my central air conditioner with a much more efficient one. (I
hope Congress restores the $500 tax credit this year!) One of the options I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Figure on about $100 per bulb on replacement costs.....

Well, if so, that becomes a $300/year expense. There is absolutely no way
that the system efficiency could be improved so much that I save $300 of
electricity (for summer only usage). The system will already be "up to" 21
SEER.

Don www.donwiss.com (e-mail link at home page bottom).

geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely the
condensate drain pan.

geothermaljones

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

donwiss:

Geothermljones is spot on. You have to be cautious on the evaporator coil
pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit thermal
transfer from the air to the coil. UV lights have been proven to increase
efficiency in that respect. Albeit over time.

The thing with mold though, is it requires a dark, damp and warm spot to
grow. That in mind, while the air conditioning is in operation, the cooling
coil hopefully is around 40º F. Not the best for mold growth. But, when
standing water is left in the condensate pan, and the system is at rest [or
heats during the evening, cools during the day], can leave the opportunity
for mold growth.

--
Zyp

On Mar 2, 5:12�pm, "Zyp" wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely the
condensate drain pan.

� �geothermaljones

"Don Wiss" wrote in message
.. .
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See:http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

donwiss:

Geothermljones is spot on. �You have to be cautious on the evaporator coil
pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit thermal
transfer from the air to the coil. �UV lights have been proven to increase
efficiency in that respect. �Albeit over time.

The thing with mold though, is it requires a dark, damp and warm spot to
grow. �That in mind, while the air conditioning is in operation, the cooling
coil hopefully is around 40� F. �Not the best for mold growth. �But, when
standing water is left in the condensate pan, and the system is at rest [or
heats during the evening, cools during the day], can leave the opportunity
for mold growth.

--
Zyp- Hide quoted text -

- Show quoted text -

well turn the heat on occasionally even in the summer.. with windows
open.

nice hot furnace air should kill any mold growing in there

wrote:
On Mar 2, 5:12?pm, "Zyp" wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely
the condensate drain pan.

? ?geothermaljones

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See:http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

donwiss:

Geothermljones is spot on. ?You have to be cautious on the
evaporator coil pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit
thermal transfer from the air to the coil. ?UV lights have been
proven to increase efficiency in that respect. ?Albeit over time.

The thing with mold though, is it requires a dark, damp and warm
spot to grow. ?That in mind, while the air conditioning is in
operation, the cooling coil hopefully is around 40? F. ?Not the best
for mold growth. ?But, when standing water is left in the condensate
pan, and the system is at rest [or heats during the evening, cools
during the day], can leave the opportunity for mold growth.

--
Zyp- Hide quoted text -

- Show quoted text -

well turn the heat on occasionally even in the summer.. with windows
open.

nice hot furnace air should kill any mold growing in there

Mold likes it steamy. Generally 98º or better in fact. Turning on the
heat occasionally might increase growth. Ever heard of "dirty sock
syndrome?" During a heat pumps operation, water left standing in the
condensate pan aids the growth of microorganisms and bacteria. The result
is the co-toxins produced and the stench as well.

As long as the condensate pan is metal, and, a UVC light is installed in
such a manor not to expose other plastic parts to the light, they are a good
remedy to eliminate mold growth around the evaporator. But, it is recommend
the bulb be replaced annually.


--
Zyp

On Mar 2, 7:34�pm, "Zyp" wrote:
wrote:
On Mar 2, 5:12?pm, "Zyp" wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely
the condensate drain pan.

? ?geothermaljones

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See:http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

donwiss:

Geothermljones is spot on. ?You have to be cautious on the
evaporator coil pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit
thermal transfer from the air to the coil. ?UV lights have been
proven to increase efficiency in that respect. ?Albeit over time.

The thing with mold though, is it requires a dark, damp and warm
spot to grow. ?That in mind, while the air conditioning is in
operation, the cooling coil hopefully is around 40? F. ?Not the best
for mold growth. ?But, when standing water is left in the condensate
pan, and the system is at rest [or heats during the evening, cools
during the day], can leave the opportunity for mold growth.

--
Zyp- Hide quoted text -

- Show quoted text -

well turn the heat on occasionally even in the summer.. with windows
open.

nice hot furnace air should kill any mold growing in there

Mold likes it steamy. �Generally 98� or better in fact. � Turning on the
heat occasionally might increase growth. �Ever heard of "dirty sock
syndrome?" �During a heat pumps operation, water left standing in the
condensate pan aids the growth of microorganisms and bacteria. �The result
is the co-toxins produced and the stench as well.

As long as the condensate pan is metal, and, a UVC light is installed in
such a manor not to expose other plastic parts to the light, they are a good
remedy to eliminate mold growth around the evaporator. �But, it is recommend
the bulb be replaced annually.

--
Zyp- Hide quoted text -

- Show quoted text -

my point was that with the heat on any mold will dry out and die.

On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "
wrote:

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.

"PaPaPeng" wrote in message
...
On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "
wrote:

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

Zyp wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely the
condensate drain pan.

geothermaljones

"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

donwiss:

Geothermljones is spot on. You have to be cautious on the evaporator coil
pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit thermal
transfer from the air to the coil. UV lights have been proven to increase
efficiency in that respect. Albeit over time.

What? And of course standard maintenance and cleaning will not maintain
efficiency? Please do explain how a UV light will increase efficiency.
UV lights serve one purpose only.. And that is to kill mold spores and
other minute parasites, germs and some viruses.. Actually a very high
test filter will do approximately the same thing. Art storage uses UV
lighting to protect paintings from such things...Yet minute scanning
still shows paint eating parasites to exist.. So ..UV lighting is not
the answer to everything.. In fact it is somewhat overhyped. By the way,
plastic and fiberglass trays are more damaged by heat then by UV
lighting. They turn brittle over time. As does many of the plastic
parts within the front control area of a furnace.. Trane is one that
needs a lot of plastic replacements after a few year.


The thing with mold though, is it requires a dark, damp and warm spot to
grow. That in mind, while the air conditioning is in operation, the cooling
coil hopefully is around 40º F. Not the best for mold growth. But, when
standing water is left in the condensate pan, and the system is at rest [or
heats during the evening, cools during the day], can leave the opportunity
for mold growth.

Zyp wrote:
wrote:
On Mar 2, 5:12?pm, "Zyp" wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely
the condensate drain pan.
? ?geothermaljones
"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:
- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency
See:http://www.residential.carrier.com/p...uality/uvlamp/
Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?
Don www.donwiss.com (e-mail link at home page bottom).
donwiss:

Geothermljones is spot on. ?You have to be cautious on the
evaporator coil pans.

HVAC Tech isn't thinking well. The mold that can grow will inhibit
thermal transfer from the air to the coil. ?UV lights have been
proven to increase efficiency in that respect. ?Albeit over time.

The thing with mold though, is it requires a dark, damp and warm
spot to grow. ?That in mind, while the air conditioning is in
operation, the cooling coil hopefully is around 40? F. ?Not the best
for mold growth. ?But, when standing water is left in the condensate
pan, and the system is at rest [or heats during the evening, cools
during the day], can leave the opportunity for mold growth.

--
Zyp- Hide quoted text -

- Show quoted text -
well turn the heat on occasionally even in the summer.. with windows
open.

nice hot furnace air should kill any mold growing in there

Mold likes it steamy. Generally 98º or better in fact. Turning on the
heat occasionally might increase growth. Ever heard of "dirty sock
syndrome?"

usually associated with A/C and beginning of the season heating.
Actually Lysol makes an excellent fungicidal/disinfectant spray that is
available at most Grocery stores for about $4.00.. Any farm store has a
battery operated mechanical release device that will trigger this spray
in the CA return at preset intervals. Usual cost about $28.00 and I have
some out there that have been running for upwards of 20 years. Spay
properly timed lasts about 2 months or more. Batteries about a year.. 2
D cells.

During a heat pumps operation, water left standing in the
condensate pan aids the growth of microorganisms and bacteria. The result
is the co-toxins produced and the stench as well.

Drop an antifungicidal pill in there each year. Or more as necessary..
Legionnaires disease is not something to speculate about.


As long as the condensate pan is metal, and, a UVC light is installed in
such a manor not to expose other plastic parts to the light, they are a good
remedy to eliminate mold growth around the evaporator. But, it is recommend
the bulb be replaced annually.

If that method is used...Absolutely.. Especially if you have miles of
ductwork such as in big commercial and hospitals.

wrote:
On Mar 2, 7:34�pm, "Zyp" wrote:
wrote:
On Mar 2, 5:12?pm, "Zyp" wrote:
geothermaljones wrote:
Check out the UV in the return ductwork...
The UV can degrade the plastics oft found on the A/C Coils, namely
the condensate drain pan.
? ?geothermaljones
"Don Wiss" wrote in message
...
I'm replacing my central air conditioner with a much more efficient
one. (I hope Congress restores the $500 tax credit this year!) One
of the options I can buy is UV lamps for the coils. Carrier makes
these claims:
- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency
See:http://www.residential.carrier.com/p...uality/uvlamp/
Now I don't yet know how much this option is (or the annual
replacement of the bulbs). But is this something worth considering?
Don www.donwiss.com (e-mail link at home page bottom).
donwiss:
Geothermljones is spot on. ?You have to be cautious on the
evaporator coil pans.
HVAC Tech isn't thinking well. The mold that can grow will inhibit
thermal transfer from the air to the coil. ?UV lights have been
proven to increase efficiency in that respect. ?Albeit over time.
The thing with mold though, is it requires a dark, damp and warm
spot to grow. ?That in mind, while the air conditioning is in
operation, the cooling coil hopefully is around 40? F. ?Not the best
for mold growth. ?But, when standing water is left in the condensate
pan, and the system is at rest [or heats during the evening, cools
during the day], can leave the opportunity for mold growth.
--
Zyp- Hide quoted text -
- Show quoted text -
well turn the heat on occasionally even in the summer.. with windows
open.
nice hot furnace air should kill any mold growing in there
Mold likes it steamy. �Generally 98� or better in fact. � Turning on the
heat occasionally might increase growth. �Ever heard of "dirty sock
syndrome?" �During a heat pumps operation, water left standing in the
condensate pan aids the growth of microorganisms and bacteria. �The result
is the co-toxins produced and the stench as well.

As long as the condensate pan is metal, and, a UVC light is installed in
such a manor not to expose other plastic parts to the light, they are a good
remedy to eliminate mold growth around the evaporator. �But, it is recommend
the bulb be replaced annually.

--
Zyp- Hide quoted text -

- Show quoted text -

my point was that with the heat on any mold will dry out and die.

The spores are shelled over and can live on for years awaiting rebirth.

Noon-Air wrote:
"PaPaPeng" wrote in message
...
On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "
wrote:

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

Don Wiss wrote:
I'm replacing my central air conditioner with a much more efficient one. (I
hope Congress restores the $500 tax credit this year!) One of the options I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual replacement of
the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

Honeywell makes some in plenum units:
http://www.pricegrabber.com/search.p...d=honeywell+uv

I am considering one for my main cold air return.

Anyone else have one of these?

a

a wrote:
Don Wiss wrote:
I'm replacing my central air conditioner with a much more efficient
one. (I
hope Congress restores the $500 tax credit this year!) One of the
options I
can buy is UV lamps for the coils. Carrier makes these claims:

- Kills bacteria & mold growing on the indoor coil
- Enhanced indoor air quality
- Enhanced air flow
- Minimizes microbial build-up on coils
- Improves system efficiency

See: http://www.residential.carrier.com/p...uality/uvlamp/

Now I don't yet know how much this option is (or the annual
replacement of
the bulbs). But is this something worth considering?

Don www.donwiss.com (e-mail link at home page bottom).

Honeywell makes some in plenum units:
http://www.pricegrabber.com/search.p...d=honeywell+uv


I am considering one for my main cold air return.

Anyone else have one of these?

a

Better link:
http://yourhome.honeywell.com/Consum...Air+Treatment/

a

"a" wrote in message news:ZPSyj.70276$C61.41326@edtnps89...
Noon-Air wrote:
"PaPaPeng" wrote in message
...
On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "
wrote:

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..........

Dr. Hardcrab wrote:

"a" wrote in message news:ZPSyj.70276$C61.41326@edtnps89...
Noon-Air wrote:
"PaPaPeng" wrote in message
...
On Sun, 2 Mar 2008 16:52:07 -0800 (PST), "
wrote:

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

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?)

On Mar 3, 7:57*pm, wrote:
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?)


I have been in hvac for over 25 years,, a contractor for about 15,,
the uv lights are the best addition to a heating and cooling system
since the use of filters,, i have personally witnessed the beniftits
of these lights in several homes. Istrongly recommend them and will
always have one installed in my system. The benefits are many ie,,
health, economics, system life.

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

In article Wzgzj.62540$FO1.53245@edtnps82, a wrote:
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.

The UV bulbs for sterilization do not have phosphors. The glass/quartz
does becoome a little less transparent to the germicidal UV as the bulb
ages.

- Don Klipstein )

On Mar 4, 6:04�pm, (Don Klipstein) wrote:
In article Wzgzj.62540$FO1.53245@edtnps82, a wrote:
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.

� The UV bulbs for sterilization do not have phosphors. �The glass/quartz
does becoome a little less transparent to the germicidal UV as the bulb
ages.

�- Don Klipstein )- Hide quoted text -

- Show quoted text -

many years ago hamilton gas dryers had these lamps. many years like
2nd world war

Check out Sanuvox
They've got a few nice return duct mounted unit, using a bulb inside a 6" or
so dia. tube.
It does not cover the entire duct, just the air flowing through the tube. It
will cover approx. 95% of the air in 3 air changes of the house.
Some of the benefits a
The light is very effective inside the tube,
being in the return it avoids light damage to the plastics, coils, etc...
the things killed are prior to the filter & should be trapped & not
distributed through the house,
(although the micron-sized ones will probably clear the filter)

Sanuvox used to, and probably still do, make a portable UV purifier that
I've seen used in post flood mold abatement.
They seemed to work fairly well, but most all the carpet/Fabric had been
removed (bleaches & Chemicals were applied liberally as well)

If you can get a doctor to prescribe a UV light for allergies etc...,
some health insurance will cover them, install & possibly replacement.

goodluck
geothermaljones


"wlwallick" wrote in message
...
On 3/3/2008 10:43:14 PM, DKH wrote:
On Mar 3, 7:57 pm, wrote:
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?)


I have been in hvac for over 25 years,, a contractor for about
15,,
the uv lights are the best addition to a heating and cooling
system
since the use of filters,, i have personally witnessed the
beniftits
of these lights in several homes. Istrongly recommend them
and will
always have one installed in my system. The benefits are
many ie,,
health, economics, system life.


Could you recommend a brand or two or a type. I have looked
at these on the net and there are quite a few ways of doing
this. Such as just mounting the light through the side of the
plenum.

WLW