Notices

AC System UV Light

Old 09-17-2020, 01:50 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Dec 2002
Location: Jupiter, FL, USA
Posts: 540
Received 42 Likes on 30 Posts
Default AC System UV Light

An AC service technician recommended that we install a UV light system in our AC air handler for $800, claiming it would eliminate mold and mildew in the system. This sounded like snake oil to me so I declined. I wanted to get the input of the Hulltruth brain trust on the matter. Thank you.
Old 09-17-2020, 01:54 PM
  #2  
Admirals Club Admiral's Club Member
 
Join Date: Jun 2018
Posts: 297
Received 217 Likes on 99 Posts
Default

It sounds logical for mold but if it is upstream of the condenser, you could grow algae.
Old 09-17-2020, 01:57 PM
  #3  
Senior Member
 
Join Date: Dec 2007
Location: New Jersey
Posts: 489
Received 226 Likes on 92 Posts
Default

When I got a new AC system installed this year they had it as an option. I looked at the guy and he gave me the eh look as if it was snake oil. Especially in times of the gread pandemic.
Old 09-17-2020, 02:28 PM
  #4  
Admirals Club Admiral's Club Member
 
Join Date: Nov 2003
Location: Coral Springs, FL, USA
Posts: 446
Likes: 0
Received 23 Likes on 21 Posts
Default

I have been thinking about doing this, but $800 is pricey. I seem some for under $200.

https://smile.amazon.com/Bio-Shield-...0374445&sr=8-4
Old 09-17-2020, 02:32 PM
  #5  
Admirals Club Admiral's Club Member
THT sponsor
 
williamwallus's Avatar
 
Join Date: Jun 2014
Location: SWFL, Midwest
Posts: 3,465
Received 795 Likes on 442 Posts
Default

$800?? I had one installed for 30 bucks. Not sure if they really work but 30 dollars I was like go for it.

Person is scamming you.
Old 09-17-2020, 06:08 PM
  #6  
Senior Member
 
Join Date: Jan 2017
Posts: 342
Received 88 Likes on 62 Posts
Default

Only kills germs in the air flow that moves past it. May help but will not 100 present keep all your ducts clear of mold or mildew.
Old 09-17-2020, 06:10 PM
  #7  
Senior Member
 
Join Date: Jul 2011
Posts: 5,126
Received 1,315 Likes on 636 Posts
Default

I have a uv light on my reverse osmosis water system. Supposed to kill viruses and bacteria.
Old 09-17-2020, 06:16 PM
  #8  
Senior Member
 
Join Date: Nov 2013
Posts: 461
Received 81 Likes on 64 Posts
Default

Reme Halo. I don’t know if you can find them because of china virus. You have to replace the light cartridge every several years. We have had one for maybe 4 years.
Old 09-17-2020, 06:26 PM
  #9  
Admirals Club Admiral's Club Member
 
Join Date: May 2017
Posts: 289
Likes: 0
Received 185 Likes on 84 Posts
Default

The newest one is a plasma generator technology no bulb to burn out.300 is cost to purchase them check those out.
Old 09-17-2020, 06:29 PM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Jul 2004
Location: South East Pa
Posts: 9,620
Received 1,019 Likes on 547 Posts
Default

Originally Posted by Wicked Awesome View Post
An AC service technician recommended that we install a UV light system in our AC air handler for $800, claiming it would eliminate mold and mildew in the system. This sounded like snake oil to me so I declined. I wanted to get the input of the Hulltruth brain trust on the matter. Thank you.
One of the biggest culprit with mold in any HVAC system is in the Evaporator coil. This is usually easy solved by installing a UV light. I've had one in my system for a number of years and it works very well. I actually have two, on in the coil and one at the end of the return. I have them set up so they power when the unit it running. We used to get a little mold growth, now we get zero. You can buy them from $100-$300 dollars and if your handy with a few tools you can install it yourself in 15 minutes

Click to follow link...
Click to follow link...

Old 09-17-2020, 06:31 PM
  #11  
Junior Member
 
Join Date: Jul 2020
Location: Smith Mountain Lake Virginia
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Wicked Awesome View Post
An AC service technician recommended that we install a UV light system in our AC air handler for $800, claiming it would eliminate mold and mildew in the system. This sounded like snake oil to me so I declined. I wanted to get the input of the Hulltruth brain trust on the matter. Thank you.
The main benefit is having the UV light shining directly on the evaporator coil and drain pan. This will keep the growth (mold and mildew) down and keep the coil clean. The UV light if installed in the general air stream has to be much more intense to kill anything. If you do have UV installed be sure all the wiring and gaskets are protected as they will break down and expect to change the bulbs every year or two ( and don't look at the light, it will burn your eyes!).
Old 09-17-2020, 06:32 PM
  #12  
Senior Member
 
Join Date: Dec 2014
Posts: 1,090
Likes: 0
Received 456 Likes on 278 Posts
Default

First the good news: UVC light can prevent a virus from replicating. You don't "kill" a virus because a virus is not a living organism. UVC light can also kill bacteria, but the viral inactivating far-UVC’s wavelength is shorter than conventional germicidal wavelength -- about 222 nanometers, rather than 254 nanometers. So you need to be sure that the UV light product you intend to use emits the right wavelengths to perform the task at hand.
And now the bad news: UV light devices are not regulated so it may be difficult to be certain that the product you buy has any effect at all on viruses or bacteria. And although UVC light has been shown to be effective in preventing replication of the SARS-2 coronavirus it probably takes at least 15 minutes of continuous exposure to the UV light to destroy the virus. So air blowing through a high flow system = snake oil. Save your money. Wear a mask when in car with someone other than a household member or open the windows when the vehicle is moving, sunroof too.
Old 09-17-2020, 06:42 PM
  #13  
Senior Member
 
Join Date: Aug 2020
Posts: 1,676
Received 974 Likes on 502 Posts
Default

Originally Posted by Captinlon View Post
Only kills germs in the air flow that moves past it. May help but will not 100 present keep all your ducts clear of mold or mildew.
Unfortunately it doesn’t kill germs that move past it.

If UV light could “kill germs” that quickly we could all just live germ free outside.

Someone sneezed in your face? No worries you’re outside!

Only thing they could do is prevent growth on your coils, but even then the benefits are meh.

Only thing that’s proven to improve air quality significantly is a better filter...... but don’t get one that’s too restrictive.

Also even if you could kill viruses in your a/c system, that’s not how you’re gonna catch a virus anyways.
Old 09-17-2020, 07:09 PM
  #14  
Admirals Club Admiral's Club Member
 
Join Date: Jul 2007
Posts: 1,200
Received 114 Likes on 70 Posts
Default

https://www.nucalgon.com/products/in...-air-purifier/

I just installed one of these in our house. It definitely crisps up the air and took away lingering odors.
Old 09-17-2020, 07:19 PM
  #15  
Admirals Club Admiral's Club Member
 
Join Date: May 2018
Location: Delaware
Posts: 691
Likes: 0
Received 209 Likes on 162 Posts
Default

Would a Ozoanator Work in those applications
Old 09-17-2020, 07:20 PM
  #16  
Admirals Club Admiral's Club Member
 
Join Date: Feb 2016
Location: Tampa Bay
Posts: 1,218
Likes: 0
Received 974 Likes on 398 Posts
Default

When i was looking at them to beat mold growth, I learned that location is a concern as the light affects wiring. Just like mentioned it can be a DIY.
Old 09-17-2020, 09:49 PM
  #17  
Joe
Senior MemberCaptains Club Member
 
Join Date: Mar 2001
Location: Libertalia
Posts: 17,299
Received 1,362 Likes on 765 Posts
Default

Seems like AC companies like Heil, Trane, Carrier, Goodman etc would be selling this as a factory option if it actually did anything.
Old 09-17-2020, 10:03 PM
  #18  
AC
Senior MemberCaptains Club Member
 
Join Date: Dec 2001
Location: Fl.
Posts: 1,404
Likes: 0
Received 207 Likes on 119 Posts
Default

Originally Posted by Joe View Post
Seems like AC companies like Heil, Trane, Carrier, Goodman etc would be selling this as a factory option if it actually did anything.
They have for more years than I can remember. They all have UV lights and filters. I've been in the business for nearly 50 years. UV is great the problem is contractors charging $800 for a $200 UV light bulb. However there are high-end UV air filtration systems that cost me well over $400 as a contractor so you got to compare apples to apples. Hospitals have been using UV light to sterilize their rooms and the air and their instruments for probably longer than I've been alive. It's not snake oil it's a fact
Old 09-17-2020, 10:13 PM
  #19  
Admirals Club Admiral's Club Member
THT sponsor
 
williamwallus's Avatar
 
Join Date: Jun 2014
Location: SWFL, Midwest
Posts: 3,465
Received 795 Likes on 442 Posts
Default

Originally Posted by TSROA236 View Post
The main benefit is having the UV light shining directly on the evaporator coil and drain pan. This will keep the growth (mold and mildew) down and keep the coil clean. The UV light if installed in the general air stream has to be much more intense to kill anything. If you do have UV installed be sure all the wiring and gaskets are protected as they will break down and expect to change the bulbs every year or two ( and don't look at the light, it will burn your eyes!).
Yep. Doesn't do much for the air just kills stuff directly in the system. Have one on my drip pan.
Old 09-17-2020, 10:22 PM
  #20  
Senior Member
 
Join Date: Feb 2013
Posts: 1,464
Received 316 Likes on 196 Posts
Default

FWIW, the UV bulb should be replaced every 9 to 12 months. The UV generation goes down over time even if the bulb looks like it is on.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.