Search:

Type: Posts; User: randyf

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    5
    Views
    420

    I too am in Texas where currently dew points this...

    I too am in Texas where currently dew points this time of year vary between the mid 60s to the low 70's. No change insight until mid Sept at the earliest.

    I've got a confirmed VOC problem -...
  2. Replies
    5
    Views
    420

    You touch a pet project of mine that has been...

    You touch a pet project of mine that has been evolving for the last 5 years.

    Before I ramble here's my view on the parameters you mentioned:

    Temp/RH
    For temp/ humidity there are, of course,...
  3. I you you review the paper work from Home Air...

    I you you review the paper work from Home Air Check you will see that levels above 500 are reason of concern. 1700 is high!
    I have the same issue.
  4. A TVOC level of 1900 is Very high. Any reading...

    A TVOC level of 1900 is Very high.
    Any reading over 500 is reason for concern. Both LEEDs and the USGBC agree to that standard.
    The reference from Home Air Check you quoted is derived from homes...
  5. What was your TVOC number provided by Home Air...

    What was your TVOC number provided by Home Air Check?

    I think particulates are suspect especially considering your history.
    Buy, borrow or steal a Dylos are something compatible and monitor your...
  6. Couple of things: If you used Home Air Check...

    Couple of things:

    If you used Home Air Check for your formaldehyde test note that their results report high. Still your levels are much higher than typical. Not quite at WHO levels but close....
  7. Replies
    7
    Views
    3,890

    The Dyson is a poor performer. The Canadian...

    The Dyson is a poor performer.
    The Canadian Broadcasting Network independently tested a number of particulate filters and the Dyson was a sub par.
    ...
  8. Replies
    3
    Views
    1,808

    Thanks for that. The application of the Daikin...

    Thanks for that. The application of the Daikin tool is unique but the innards are exactly the same as all the consumer based IAQ measurement devices that have hit the market in the last few years.
    A...
  9. Thread: Casino

    by randyf
    Replies
    44
    Views
    10,422

    Yes - And I posted my Super Duper Quadruple "DUH"...

    Yes - And I posted my Super Duper Quadruple "DUH" two days ago.
  10. Thread: Casino

    by randyf
    Replies
    44
    Views
    10,422

    Well - That's a big fat Quadruple DUH on me. ...

    Well - That's a big fat Quadruple DUH on me.

    Just saw I was responding to a thread 12 years old

    At least no harm/no foul.
  11. Thread: Casino

    by randyf
    Replies
    44
    Views
    10,422

    HUH??? Sorry but when it comes to gases...

    HUH???
    Sorry but when it comes to gases ventilation DOES work. That an undisputed truth that's almost as certain as the truth of long division.

    150 ppm translates (using Isobutylene as an...
  12. As far as your VOCs and CO2 goes your readings...

    As far as your VOCs and CO2 goes your readings are very good.

    BUT - I would allow a Big (possible very big) fudge factor for accuracy of your Air Things thingy.

    For VOCs I'd recommend...
  13. Very fair question. I apologize in advance for...

    Very fair question. I apologize in advance for the long winded nerdy explanation that follows. My wish is for more folks like yourself to become conversant with this stuff to call out manufactures on...
  14. The I-wave might reduce particulate pollution,...

    The I-wave might reduce particulate pollution, but,contrary to the claims of GPS, will do nothing for VOCs.
  15. Very interesting and nuanced findings. From the...

    Very interesting and nuanced findings.
    From the Abstract:

    Increases in PM2.5 and negative ion (NI) exposure were independently associated with increased urinary concentration of malondialdehyde,...
  16. Replies
    3
    Views
    1,808

    No it is not unique. This technology is based...

    No it is not unique.

    This technology is based on integrated circuit parts and modules from a variety of manufacturers
    Accuracy varies depending the particular implementations used.

    Some (not...
  17. Thread: Casino

    by randyf
    Replies
    44
    Views
    10,422

    FYI - The mode of action of Fabrize is unique....

    FYI - The mode of action of Fabrize is unique. The active element is a molekule called beta-cyclodextrin. Some VOCs will get trapped inside the beta-cyclodextrin molekule and will be out of reach of...
  18. Replies
    7
    Views
    2,300

    I second Ian's recommendation of the Dylos device...

    I second Ian's recommendation of the Dylos device for measuring particulate levels. The device uses the same technique, laser scattering, that is used in high cost industrial units and delivers an...
  19. Replies
    62
    Views
    35,912

    The GPS technology might be effective for: 1....

    The GPS technology might be effective for:
    1. particulates
    2. biologicals - with restrictions

    But I find their claims about VOC reduction unsubstantiated. They seem to confuse the meaning of...
  20. Replies
    23
    Views
    12,538

    Info on the web the BlueAir classic models...

    Info on the web the BlueAir classic models include:
    1. Large CFM capability
    2. HEPA filtration - for particulates not VOCs
    3. Electro Static grill to negatively charge particulates and collect on...
  21. Curious how you determined your VOC levels. If...

    Curious how you determined your VOC levels. If you used one of the consumer MOS based meters that are readily available I'd be very hesitant in believing the results.

    I'd recommend doing a Gas...
  22. Replies
    62
    Views
    35,912

    Hi Frank, I'm really at my wits in dealing...

    Hi Frank,

    I'm really at my wits in dealing with overstated, under supported claims of various manufacturers regarding IAQ, especially with VOCs.[/B][/I]

    I don't think GPS systems emit harmful...
  23. Replies
    62
    Views
    35,912

    Hey Frank, i know this is a couple of year...

    Hey Frank,

    i know this is a couple of year old, but I was speaking to Alpha Labs the other day and they mentioned they build the ion meters for GPS. They just label for GPS.
    Thought you might be...
  24. Replies
    62
    Views
    35,912

    I would like to add that partial breakdown...

    I would like to add that partial breakdown products of oxidants can be harmful. The data is mixed on this warning.
    Also if these breakdown products are a problem steps might be undertaken to avoid...
  25. Replies
    62
    Views
    35,912

    This is very dependent on the oxidant in...

    This is very dependent on the oxidant in question.

    Hydroxyls - the most potent oxidizer (other than fluorine) - as regards VOCs are harmless. The FDA and lab data both agree on this. These...
  26. Replies
    23
    Views
    12,538

    No difference. Same technilogy

    No difference. Same technilogy
  27. Replies
    23
    Views
    12,538

    I have doubts about GPS claims of VOC reduction....

    I have doubts about GPS claims of VOC reduction.
    Here's a quote from GPS's website:

    "The ions breakdown harmful VOCs with an Electron Volt Potential under twelve (eV<12) into harmless compounds...
  28. UVC doesn't literally burn through coils, it...

    UVC doesn't literally burn through coils, it destroy biologicals living on coils -kills em dead.
    No harm to your coil.
  29. Replies
    104
    Views
    9,159

    Thanks for the expansion and quantitative...

    Thanks for the expansion and quantitative example.

    Also thanks for correcting my bad physics. Smaller and larger system both remove sensible and latent heat the at same rates. They are, for the...
  30. Replies
    104
    Views
    9,159

    Very engaging thread. Blown away with the quality...

    Very engaging thread. Blown away with the quality of replies.

    I am not an AC pro, but I believe there is a reason why an over sized system will cool temps faster and dehumidify less proportionally...
  31. Thread: REME HALO-LED

    by randyf
    Replies
    14
    Views
    15,552

    Sounds good. I've really been impressed with...

    Sounds good.

    I've really been impressed with the aeroseal process. I've heard from reputable source of remarkable results.

    Once all is said and done you should have any concerns with...
  32. Thread: REME HALO-LED

    by randyf
    Replies
    14
    Views
    15,552

    Haven't tested the new RGF device yet. Here's...

    Haven't tested the new RGF device yet.
    Here's my suggestion for you:

    Determine if you even have a VOC issue.

    Use the service of https://homeaircheck.com/products/ or...
  33. Replies
    27
    Views
    10,428

    Home Air Check can provide a testing kit and you...

    Home Air Check can provide a testing kit and you return the sample. In a week or less you'll have a pretty accurate of reading TVOC including formaldehyde.
    The lab used is highly credentialed and...
  34. Replies
    23
    Views
    12,538

    Also Evoaire, I believe, is an international...

    Also Evoaire, I believe, is an international manufacturer. I"d be interested in learning more about our technology.

    Thanks
  35. Replies
    23
    Views
    12,538

    My understanding is that GPS does not offer money...

    My understanding is that GPS does not offer money back guarantees.
    If you know of a reseller/distributor that will loan me one I"d be willing to test.

    And keep in mind testing cost me about...
  36. Thread: REME HALO-LED

    by randyf
    Replies
    14
    Views
    15,552

    Thanks for inquiring. Not only vague but BS....

    Thanks for inquiring.

    Not only vague but BS. Probably talking from someone in sales/marketing. He may not know better.
    But
    - UV Leds only radiate in the UVA frequency range. This frequency...
  37. Thread: VOC Elimination

    by randyf
    Replies
    14
    Views
    4,709

    Teddy - Your advice has been invaluable to me...

    Teddy - Your advice has been invaluable to me over the years and there is no doubt fresh air intake is the fastest, surest way to bring down VOC levels.

    But in the case under discussion I think a...
  38. Thread: VOC Elimination

    by randyf
    Replies
    14
    Views
    4,709

    Here's two Labs I've used: 1....

    Here's two Labs I've used:
    1. https://homeaircheck.com/products/
    Home Air Check is an offering from Prism labs offers testing by home owners and business owners to test without using a IAQ...
  39. Thread: REME HALO-LED

    by randyf
    Replies
    14
    Views
    15,552

    Thanks for the pointer. This device has piqued my...

    Thanks for the pointer. This device has piqued my interest.

    As far as VOCs goes testing with GC/MS and PID meters in homes is the only way to know
    Unfortunately RGF is is unlikely to provide the...
  40. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    If you do get readings please post. I don't...

    If you do get readings please post.
    I don't think this has been done and will be a real contribution. If levels are anywhere near 50ppb and above the public should know.
  41. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    Looks like a reputable company. Also check out...

    Looks like a reputable company.
    Also check out Oxidation Technology -oxidationtech.com

    If you purchase make sure upper end is >= .05ppm (50ppb)

    These devices get more expensive as the upper...
  42. Thread: VOC Elimination

    by randyf
    Replies
    14
    Views
    4,709

    Your a head of the game. Good data taking. I...

    Your a head of the game. Good data taking. I still suspect the VOC readings but GC/MS test will be the true tell.
    Very interested in what you find.

    One final suggestion: The Foobot does have the...
  43. Thread: VOC Elimination

    by randyf
    Replies
    14
    Views
    4,709

    I'm very interested in what you find as there are...

    I'm very interested in what you find as there are so many unknowns and a real shortage of educated guidance in these issues.
    As far as the new low cost consumer VOC meters go - the Foobot has one of...
  44. Thread: VOC Elimination

    by randyf
    Replies
    14
    Views
    4,709

    How did you determine the ppb levels? If this...

    How did you determine the ppb levels?

    If this info is coming from one of the Low Cost air quality meters that have become available in the last few years - BE WARE. These devices can be VERY ...
  45. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    Really, really appreciate your comment Breathe...

    Really, really appreciate your comment Breathe Easy. Thanks!

    Any you're correct - I know that means something. Years ago when I first started investigating I reviewed your history here (and other...
  46. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    Home Air Check's (an arm of Prism Labs) basic...

    Home Air Check's (an arm of Prism Labs) basic test only provides TVOC levels and a breakdown of VOC categories, not individual VOCs, with their standard test. For an extra charge Home Air Check...
  47. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    \ So glad your problem is resolving. I wish I...

    \

    So glad your problem is resolving. I wish I could be so lucky.

    I disagree with Consumer Reports- you do not need a professional for the Home Air Check test. Are you sure they weren't talking...
  48. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    You've got a lot of stuff, I'll respond to a few....

    You've got a lot of stuff, I'll respond to a few.

    1. Contrary to what you were told it does not cost thousands to test for *each* VOC.
    Home Air Check, https://homeaircheck.com/products/, will...
  49. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    Couple of comments: 1. Humidity in your room is...

    Couple of comments:
    1. Humidity in your room is too high. Should be under <50. VOCs off gas more in a high humidity environment not to mention all the biological issues

    2. Bringing in outside air...
  50. Thread: Ozone Removal

    by randyf
    Replies
    42
    Views
    23,658

    I'm an amateur not a pro. Suggestions: 1....

    I'm an amateur not a pro.

    Suggestions:
    1. HVAC-TALK has a list of vetted Pros - most likely some in your area. Don't know if any would have the expertise in IAQ issues that's your central...
Results 1 to 50 of 151
Page 1 of 4 1 2 3 4