Page 2 of 2 FirstFirst 12
Results 14 to 21 of 21
  1. #14
    Join Date
    Sep 2002
    Posts
    20,101
    Post Likes
    I laugh too - but not because it's impossible as I have done it myself. Even walked Upright inside metal ducts at the Civic Center Hilton in Philadelphia. What I laugh about is how shiny and spotlessly clean the inside of the air ducts are. <g>

    PHM
    -------




    Quote Originally Posted by Nuclrchiller View Post
    I laugh every time I see a movie or TV show where somebody is crawling around above the ceiling. Even more so when they're crawling thru the duct work.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  2. Likes Juan Madera liked this post
  3. #15
    Join Date
    Sep 2002
    Posts
    20,101
    Post Likes
    I have never done it but it seems easy enough to do - assuming access the the building's mechanicals. Mount a spray nozzle into the side of the duct near the reheat coil and actuate a solenoid valve whenever the target was in the conditioned space. Powering the valve via the building management system would also be easy enough.

    Air quality testing is common. You could always inflate a large garbage bag with the air flow from a register in the suspected space. Seal it shut with packing or other tape and then have a lab analyze the contents.

    Audible humming is not typically referred to as blow-back; no.

    What kind of glycol are you referring to? Some are food and cosmetic additives and so are unlikely to cause any sort of harm. Ethylene glycol is seen as a sugar by mammals. Toxicity typically takes the form of cell starvation. The body assumes the EG is sugar and processes the same way. This process ends at the cell level as the cells cannot process the EG as they would sugar and they have no way of expelling it. As a result cells accumulate EG until they have no room left for sugar. Right after that the cells die, essentially by starvation. If this is systemic the organism also dies.

    Why did you mention glycol?

    PHM
    -------



    Quote Originally Posted by ExtraG View Post
    Anyone ever heard of or imagine a way of harassing an employee or building occupant by way of these building management software packages (Honeywell, etc). By causing the vent to push irritant into a work area on demand. How might one test for this oderless irritant to the back of hands, neck and face? There is an audible humming from the unit in the ceiling. Might this be referred to blow back?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  4. #16
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    26,319
    Post Likes
    Quote Originally Posted by Poodle Head Mikey View Post
    Why did you mention glycol?
    My guess is that someone mentioned that the pipes had glycol in them, and he is thinking that it is leaking out. On purpose...to harass him.

    Those mean glycols!!
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  5. Likes Core_d, BBeerme liked this post
  6. #17
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    7,823
    Post Likes
    When I worked in house at the food plant, I suddenly found myself in need of quite a large quantity of glycol for a chiller that we were flushing out on the chilled water side. When I asked about where to order it, management told me there was no need, they had all the glycol I could use because it was an ingredient in the food
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

  7. Likes BBeerme, BALloyd liked this post
  8. #18
    Join Date
    Dec 2013
    Location
    Dallas, TX
    Posts
    141
    Post Likes
    I could imagine a few ways to do this but it would require many hours of stringing wires, accessing the ductwork and testing different methods. Not to mention figuring out what might be a good irritant. If I really hated someone like that and was the type of person for spite, it would be far easier to access their desk late at night and take things or smear the irritants on their keyboard.

    More importantly, what would probably work just as well and require no work on my part, would be to convince the individual that I had messed with the ductwork and had the powers described. Just the belief that someone could do something would almost certainly produce psychosomatic effects mimicking what is described.

    As far as climbing through the ductwork. It is possible in a very limited way. Very short distances in very specific pieces are accessible. Not to mention the ductwork may not be able to hold the weight of a person. I can think of few more terrifying and probably painful ways to be squeezed to death than being inside rigid ductwork as the weight caused the section I was in to break loose of the ceiling and turn from a straight path into an L. And flex duct is right out.

  9. #19
    Join Date
    Jul 2012
    Location
    Bridgeton, MO, 'burb of St. Louis, Mo
    Posts
    3,118
    Post Likes
    Am I the only one that senses a budding author in search of "new, exciting" MO? If I am wrong, well, I am just not right! It was fun going through the weeds with you all! OP did use the term "imagine."

    RIP Mr. Gizmo End of watch 10/27/2016
    It was a good situation, until everything went wrong!
    Rub some dirt on it and walk it off...
    We will always know it should have worked!
    Don't believe signature quotes. - George Washington

  10. #20
    Join Date
    Sep 2002
    Posts
    20,101
    Post Likes
    One time I was doing work for a large food processing facility. They used R-22 by the Skid load but pooh-poohed the idea of repairing any leaks. Because the chiller were part of production - the maintenance dept. had gotten the cost of the R-22 taken from production's budget. So the leak repairs would be "maintenance budget" - and Production would be saving the operating costs. <g>

    I hate leaks and waste so I just set to quietly fixing the leaks while doing other projects. Everything was T&M so I just billed them for whatever we did. After a couple years there was a Big Investigation. Someone in Corporate; accounting dept. had spotted the radically lower R-22 costs and immediately assumed that the R-22 was an product "ingredient" and production people were altering the food 'recipes'. <g>

    PHM
    -------



    Quote Originally Posted by rider77 View Post
    When I worked in house at the food plant, I suddenly found myself in need of quite a large quantity of glycol for a chiller that we were flushing out on the chilled water side. When I asked about where to order it, management told me there was no need, they had all the glycol I could use because it was an ingredient in the food
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  11. #21
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    26,319
    Post Likes
    Anything is possible with enough time and money. Just ask the people at the Skunk Works.

    That said, it is unlikely that such a setup would be withing the reach of most folks. Harassing someone is not worth the hassle the person doing the harassing would have to endure...
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







Page 2 of 2 FirstFirst 12

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.