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  1. #1
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    Oct 2013
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    UV lights and pros/cons

    My in-laws have a condo in south Florida. They are looking into moving there full time in about a year or so. They were recommended a UV light for potential mold in the moist air down there. While we use them here (Ohio Valley/high humidity) they arenít even an average in popularity. I know they can attack plastics that arenít UV stable, but give me all the pros/cons please, thanks!

  2. #2
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    Jul 2013
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    Richmond, VA
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    Iím not a fan of them. UV lights only sterilize the surface they shine on and it takes hours to affect anything, so air passing through and all the places the light doesnít hit makes it a futile approach. If they have Ďmoldí in their air handler, thatís a consequence of low airflow and poor filtration. Fix that before slapping a UV light in.

  3. #3
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    Mar 2018
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    Chico, Ca #StateofJefferson
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    Always seems like after a few years, people get cheap or forgetful and just stop putting in new bulbs, but theres little to no slime growth around my area so theres no real need. A lot of that kind of stuff stinks of snake oil to me, the way they market it at least is questionable at best

  4. #4
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    Oct 2013
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    There is no mold issues. They do seem to have higher indoor humidity than I would like to see (55-60%), but that is only in the worst times of the year. I put a WiFi t-stat on and monitor everything. They had as part of the normal purchase inspections a contractor look at the hvac. They recommended the UV. Again we donít use them here very much, thatís why Iím reaching out. Thanks again.

  5. #5
    Join Date
    Nov 2006
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    Southeastern Pa
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    Actually, the UV light strikes everything that passes by it. Every water droplet, every particle. Not just surfaces.

    These UV technologies have been used in hospitals since the 1950's. They help kill airborne pathogens.

    Even homes with immune compromised residents will have a UV array in the ductwork.

    I would have to look at data, but it should kill mold spores as well. You don't have to have mold issues to have mold spores floating around. Are there mold spores in Florida? Probably.

    You DO have to look at the system and replace bulbs on a regular basis.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
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  6. #6
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    Oct 2013
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    Thanks timebuilder, Iíd say as humid as Florida is that yes there are mold spores floating around. Iíll do some research and hat is not sales driven and see what is best for them. I have told them that this is an extra maintenance item to think about.

  7. #7
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    Jan 2005
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    St. Lucie West, FL.
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    Some produce an ozone and it effects certain persons. Eyes burn and irritating. My company pushes the RGF brands.

  8. #8
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    Oct 2013
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    Thread Starter
    Quote Originally Posted by baby b View Post
    Some produce an ozone and it effects certain persons. Eyes burn and irritating. My company pushes the RGF brands.
    Thanks for that input

  9. #9
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    Mar 2018
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    Chico, Ca #StateofJefferson
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    A whole home dehumidifier would probably be more beneficial, keeping the home at or below 50% RH will increase comfort and reduce the likely hood of biological roommates, who like 60% and above RH. Keeping the humidity low would probably be my biggest concern if my folks lived in green grass country

  10. #10
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    Apr 2004
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    Quote Originally Posted by Makeitcold View Post
    A whole home dehumidifier would probably be more beneficial, keeping the home at or below 50% RH will increase comfort and reduce the likely hood of biological roommates, who like 60% and above RH. Keeping the humidity low would probably be my biggest concern if my folks lived in green grass country
    This^^^^^^^
    A Veteran is a person, who at some point in their life, wrote a blank check payable to the United States of America for payment up to and including their life.
    Gene Castagnetti-Director of the National Memorial Cemetery of the Pacific in Hawaii

  11. #11
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    Quote Originally Posted by Makeitcold View Post
    A whole home dehumidifier would probably be more beneficial, keeping the home at or below 50% RH will increase comfort and reduce the likely hood of biological roommates, who like 60% and above RH. Keeping the humidity low would probably be my biggest concern if my folks lived in green grass country
    I agree 100%, Iíve already recommended that. The major problem is there is zero place for one. Picture a typical 6-7 story condominium. Everything is completely covered and the unit sits in a closet with the water heater. The only spot I have found that might work has no place to drain the condensate.

  12. #12
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    Nov 2006
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    You could always drain the water into a condensate pump and run a plastic line to anywhere that's convenient for water disposal.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  13. #13
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    Oct 2013
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    Louisville, Ky
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    Thread Starter
    The only place I see as an option is a closet. It on a corner and fairly easy duct routing. There is no power close or a drain. Itís a first floor unit and the joists donít run in a way to fish In power or water.

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