Posted by
Message
PJinAtl
Auburn Fan
Atlanta
Member since Nov 2007
10879 posts

UV bulbs in HVAC ducts - do they work?
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?


CatfishJohn
LSU Fan
Member since Jun 2020
1483 posts
 Online 

re: UV bulbs in HVAC ducts - do they work?
Do you guys have compromised immune systems or extreme allergies or something?

I just can’t see the reason for this. Genuinely curious.


PJinAtl
Auburn Fan
Atlanta
Member since Nov 2007
10879 posts

re: UV bulbs in HVAC ducts - do they work?
No. We have typical seasonal allergies.

My mom (80s) does live with us part time, and she has Parkinson's and is a 2x cancer survivor, but no compromised immune system.

The HVAC tech just mentioned it. I am wondering if they ordered a bunch thinking people would want them for Covid and the demand hasn't been there, so they are trying to off load them.


slacker130
Auburn Fan
Your mom
Member since Jul 2010
4498 posts

re: UV bulbs in HVAC ducts - do they work?
I think for them to be effective, there's some pretty tight tolerances for airflow by the actual light, so I'd do some research.

My father used to sell commercial/industrial HVAC stuff and did many quarantine rooms & hospitals operating rooms. He swore by the UV light and was convinced years ago that drug resistant TB would kill us all.


Replies (0)
Replies (0)
00
CatfishJohn
LSU Fan
Member since Jun 2020
1483 posts
 Online 

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

My mom (80s) does live with us part time, and she has Parkinson's and is a 2x cancer survivor, but no compromised immune system.


I'd say that she isn't in the best shape to fight something off so there may be value there.

I truly don't know if they are effective though, I'd imagine there are a lot of variables (duct size, airflow, etc.)



Replies (0)
Replies (0)
00
CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2635 posts
 Online 

re: UV bulbs in HVAC ducts - do they work?
Though I can’t answer your specific question, speaking with neighbor who just had 1 of his 2 HVAC units replaced a couple months ago, the HVAC servicing his bedroom areas, and he told me they also had an oxidizing UV unit installed with the new HVAC, and he said since the install he and and his wife no longer wake up in the morning with sinus related issues.
This post was edited on 11/20 at 12:22 pm


Replies (0)
Replies (0)
01
FishinTygah84
LSU Fan
LA
Member since Dec 2013
1571 posts

re: UV bulbs in HVAC ducts - do they work?
Don't waste your money. UV is decent but they lose efficacy over time. I did a ton of research and pulled the trigger on a GPS unit. They have been around in hospitals a long time. They are overall better because they require zero maintenance, produce zero ozone, and kill germs in air and on surfaces.

LINK /

they are pretty comparable in price to UV lights as well


Hamma1122
Member since Sep 2016
12009 posts

re: UV bulbs in HVAC ducts - do they work?
He’s trying to make a commission


Replies (0)
Replies (0)
50
Man4others
Member since Aug 2017
1614 posts

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


PJinAtl
Auburn Fan
Atlanta
Member since Nov 2007
10879 posts

re: UV bulbs in HVAC ducts - do they work?
Yeah, I kinda felt the same way that it was gimmicky/commission driven.

But, thought I would ask.


TD SponsorTD Fan
USA
Member since 2001
Thank you for supporting our sponsors
Advertisement
LSUA 75
LSU Fan
Colfax,La.
Member since Jan 2019
1413 posts

re: UV bulbs in HVAC ducts - do they work?
I had the GPS unit installed due to some mold issues in air handler,it eleminated it.Also gets rid of odors after frying foods,no longer have to burn candles.
I have no idea how this works but I no longer have static electricity issues in the winter.


Replies (0)
Replies (0)
10
baldona
Auburn Fan
Florida
Member since Feb 2016
13383 posts

re: UV bulbs in HVAC ducts - do they work?
$600 for one unit? That sounds pretty insane for installing a light to me.

But fwiw, this hvac tech that I use that’s in his mid 70s I believe and charges me $50 occasionally for a quick service call told me this year he though the UV lights were the next big thing and worth it. I think he said they were like $100 plus installation.


Replies (0)
Replies (0)
00
SEC. 593
Missouri Fan
Chicago
Member since Aug 2012
2517 posts
 Online 

re: UV bulbs in HVAC ducts - do they work?
UV light needs a certain length of contract time to kill anything. How long do you think it takes to blow past a certain spot in a vent shaft?


humblepie
LSU Fan
Member since May 2008
449 posts

re: UV bulbs in HVAC ducts - do they work?
It was my understanding that the UV lights are usually installed in the air handler to kill any mildrew that might form on the coils not for disinfecting the air.


Replies (0)
Replies (0)
40
ruzil
Southeastern LA Fan
Baton Rouge
Member since Feb 2012
14442 posts
 Online 

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

UV light needs a certain length of contract time to kill anything. How long do you think it takes to blow past a certain spot in a vent shaft?


This!

I researched it for my office and decided against it for this reason.


Replies (0)
Replies (0)
00
notsince98
Missouri Fan
KC, MO
Member since Oct 2012
13516 posts

re: UV bulbs in HVAC ducts - do they work?
UV is good for water but doesn't do much for air. It does nothing for allergens.


Replies (0)
Replies (0)
00
CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2635 posts
 Online 

re: UV bulbs in HVAC ducts - do they work?
Good read “Do UV Lamps Really Improve Indoor Air Quality”. LINK. Author is a building science/energy professional with a Ph.D. In physics.


Replies (0)
Replies (0)
00
Cajun Invasion
New Orleans Saints Fan
Abbeville, Louisianna
Member since Jan 2012
1745 posts

re: UV bulbs in HVAC ducts - do they work?
Definitely would recommend a GPS over a uv light.


bluedragon
Auburn Fan
Birmingham
Member since May 2020
1532 posts
 Online 

re: UV bulbs in HVAC ducts - do they work?
I sat with the HVAC Salesman and asked ....

So, you hang a UV light in a ten to twelve inch diameter duct, light it up and expect the UV light to cut contaminants while they blow by at say 20-30 mph. Meanwhile, my UV tube in the filtration system of my salt water tank is a three inch diameter bulb inside a five inch diameter PVC Pipe and I don't trust the killing power while flushing over 500 gallons an hour inside that tube. What am I missing here?

Couldn't answer the question.


Replies (0)
Replies (0)
01
diat150
Tulane Fan
OPELOUSAS
Member since Jun 2005
34409 posts

re: UV bulbs in HVAC ducts - do they work?
What model did you get?


first pageprev pagePage 1 of 2next pagelast page

Back to top

logoFollow TigerDroppings for LSU Football News
Follow us on Twitter, Facebook and Instagram to get the latest updates on LSU Football and Recruiting.

FacebookTwitterInstagram