browntiger2

HVAC UVV / UVC lights - Worth it?

BT
9 days ago

About to install 72W furnace UV purifier with two 16" UVC light bulbs OZONE free switched by the blower. May replace the bottom one with UVV.... Just wondering if this worth $100?

Comments (5)

  • sktn77a
    9 days ago

    Just wondering what is worth $100 - the whole thing or just the premium for the UVV bulb? Not a fan of UV lights in an AC system in general.

  • BT
    Original Author
    9 days ago

    Whole thing. Two light bulbs, the ballast and the cord. Bulb is only $20. Worked one summer as HVAC tech. Wiring is pretty trivial.

  • PRO
    Austin Air Companie
    8 days ago

    The bulbs have to be replaced annually. If you're not going to maintain them (paying for those new bulbs year in and year out) then keep the $100 in your wallet. If you don't change them annually they aren't doing nothing as they lose effectiveness over the course of a year.


    I'm not a fan of UV lights either, but if someone wants to part with their money I will install them and / or replace the bulbs annually.



    BT thanked Austin Air Companie
  • BT
    Original Author
    8 days ago

    Thank you @Austin Air Companie. The blower runtime ... may be 1/3rd. This is a cheap upgrade but I am not convinced it does anything.


    A complete luck of Youtube glorious reviews is concerning, except from egits who installed china 9W bulb or a pair of 9W [18W] (some cut a ductboard for it) LOL.


    Thinking about exposing aircleaner terminal, and replacing furnace 1 gang switch box with 2, furnace and switched outlet.

  • Mini-Split Warehouse
    5 days ago

    Do UV Lights Kill Mold, Bacteria and Viruses?

    https://www.minisplitunit.org/



    Ultraviolet lights were shown to kill mold, viruses and bacteria more than 100 years ago. In fact, in 1903, Niels Finsen was given the Noble Prize in Medicine for using UV to effectively treat patients with skin infections.


    Today, UV lights are used for germicidal use in hospitals, restaurants and grocery stores. And they have been shown effective in killing sterilizing an HVAC system. Here are two examples:


    1). In 2012, a study at Duke University Medical Center showed that UV lights killed 97% of bacteria that were resistant to antibiotics, the so-called superbug bacteria that are the toughest to kill.


    2). The Journal of Applied and Environmental Biology reported in 2001 that germicidal UV radiation significantly reduces airborne fungi in air handling units.


    Are UV Lights for HVAC Worth the Cost?


    After the cost of the light or lights you choose, you can expect to spend $45 to $70 per year to pay for the energy they use and for replacement lamps. Is it worth it?


    Your health provides the answer. If you and household members do not have breathing issues or allergies and if you’re not experiencing higher-than-normal rates of colds and other viruses, then you probably don’t need germicidal UV lights in your HVAC system.


    However, some might be reading this post because those problems are a reality in your home. For you, HVAC UV lights can be part of the solution. We recommend these steps:


    1). Have your furnace or air handler and coil thoroughly cleaned (though we don’t recommend duct cleaning)


    2). Seal ducts to prevent infiltration of contaminants


    3). Ask your technician if a high-MERV filter is right for your furnace or air handler, and install one if so


    4). Have a UV coil light installed, since the coil is the primary location for the growth of fungi and bacteria


    5). If your issues are severe, have a UV air sanitizing light installed in the duct


    6). Remember to clean or replace your filter as recommended