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  1. Thread: Ozone Removal

    by randyf
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    14,943

    \ 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...
  2. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    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...
  3. Thread: Ozone Removal

    by randyf
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    14,943

    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...
  4. Thread: Ozone Removal

    by randyf
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    14,943

    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...
  5. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    I don't think that's a good idea!!

    I don't think that's a good idea!!
  6. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    Just a quick response to your questions/comments....

    Just a quick response to your questions/comments.
    1. Lastest research on plants show they are not effective in real living environments. Earlier investigations show they might work in special...
  7. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    Also I would NOT experiment with Hydrogen...

    Also I would NOT experiment with Hydrogen Peroxide now that I'm sure you do not have an ozone problem.
  8. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    Just a couple of thoughts to wrap up. 1. I don't...

    Just a couple of thoughts to wrap up.
    1. I don't think your issue is ozone. There is no way the IQ Air can generate ozone.

    2. The Coway device Blue Light is measuring Particulates, not VOCs....
  9. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    I had assumed you applied an ozone shock...

    I had assumed you applied an ozone shock treatment. I see now that's not the case.
    There is no way the IQ Air could generate the ozone to explain what you are experiencing. Impossible.

    I suspect...
  10. Thread: Ozone Removal

    by randyf
    Replies
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    14,943

    The issue with the some carbon based filters is...

    The issue with the some carbon based filters is not the carbon but the additives that are sometimes added, usually Potassium permanganate.

    Carbon can trap some VOCs (not all) in the caverns...
  11. Residential VOC standards - Can PCO (MoleKule, RGF, lots of others) help?

    The United States Green Building Council (USGBC) has established a standard for indoor residential VOC levels. The spec is available...
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    I certainly don't deny your report. Lots of...

    I certainly don't deny your report. Lots of folks have have posted similar results(on the web) and I'm certain many are sincere.

    My report is very specific - Lack of VOC reduction measured with...
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    Keep on using your HEPA and confirming with...

    Keep on using your HEPA and confirming with Dylos.
    Unless your HEPAs have a lot of carbon be doubtful of VOC reduction.

    Here are two reliable sources that provided a VOC test kit. Much cheaper...
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    Here's the link to the Austin Air device I was...

    Here's the link to the Austin Air device I was using previously.
    Probably a safer bet than the other device as regards warranty and an established company:...
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    Here's the carbon filter-...

    Here's the carbon filter- https://www.amazon.com/gp/product/B06X3VFK2T/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1
    Here's the matching inline fan -...
  16. The best one I know of (

    The best one I know of (<$300) is the Coway Mighty and it's on sale at Amazon. Normally ~$220 now <$180.
    Winix makes good stuff but testing shows the Coway is (a little) better. See review at...
  17. glad you found a course of action. Just read...

    glad you found a course of action.

    Just read the specs on the Intellipure - Quite impressive!! Best advertised specs I've seen for particulates.

    FYI - I don't believe the GPS devices emit...
  18. I"ve been investigating air cleaning technologies...

    I"ve been investigating air cleaning technologies for VOC reduction for a couple of years now. It's been quite a ride.
    Although your concern are biologicals, not VOCs, I do have some suggestions.
    ...
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    For clarity - My post concern VOCs, not...

    For clarity - My post concern VOCs, not particulates (objects >.01 microns). VOCs are a different animal all together than particulates.
    DSS - is generated by biologicals (a particulate). The smell...
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    Yes - I know. And that is one of the underlying...

    Yes - I know. And that is one of the underlying themes of my post. Manufactures are making claims that aren't supported.

    My initial investigation started with MoleKule. Unlike GPS they were very...
  21. DSS is biological, so previous remarks about VOCs...

    DSS is biological, so previous remarks about VOCs may not apply.

    You might want to check these guys. They have some unique UVC approaches that I've heard good things about.
    Apparently all UVC...
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    I have also seen a lot of positive reports about...

    I have also seen a lot of positive reports about GPS technology (rebranded by NuCalgon) but I have some doubts.
    I approached them about testing. Told them I wouldn't release results unless they...
  23. In addition to Teddy's advice you might want to...

    In addition to Teddy's advice you might want to consider HEPA filtration. These devices will trap mold spore (but they won't kill em)
    For an excellent objective review see: ...
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    Sorry, my bad. Just discovered this post...

    Sorry, my bad. Just discovered this post originated in 08.
    In any case - the info in my post still applies to your query.

    If you're using one of the recently available consumer air monitor i'd be...
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    I'd be very skeptical of readings on the...

    I'd be very skeptical of readings on the AirAdvice unit. They use a Honeywell ppbRAE3000 to calibrate at their shop and calibration, even on a ppBRAE3000 is touchy. Much less 1 step removed on the...
  26. Thanks breath easy. I know your an evidence base...

    Thanks breath easy. I know your an evidence base sort with a deep professional interest in this stuff. Your comments are appreciated. your comments.
  27. Thanks breath easy. I know your an evidence base...

    Thanks breath easy. I know your an evidence base sort with a deep professional interest in this stuff so I appreciate your comments.
  28. On a closer read I realize I didn't answer all...

    On a closer read I realize I didn't answer all your issues:

    1. The Austin Air WILL release VOCs when saturated or even before. I've measured this myself with a PID meter. I increased the...
  29. No worries -feel free to query anytime. Here's...

    No worries -feel free to query anytime.

    Here's what I suggest if you can afford it (130 - $450):
    Test at least one room in your home by GC/MS(gas chromography/ mass spectrometry)
    Here are two...
  30. Thread: VOC Elimination

    by randyf
    Replies
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    1,275

    Ozone treatments are probably used hundreds of...

    Ozone treatments are probably used hundreds of times a day for just the sort of problems you mention. Most all restorations companies use them for fire/flood damage. And there are tons of companies...
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    Another option is to test for Mold VOCs. As...

    Another option is to test for Mold VOCs. As opposed to looking for spores, this test will detect the biological metabolites of mold growth.
    The test are done by credentialed labortories. In...
  32. Thread: VOC Elimination

    by randyf
    Replies
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    Yep - these can be seemingly intractable...

    Yep - these can be seemingly intractable problems. See my post over the last few years.

    Here's a pdf where I summarize all the info I've collected and tried to organize for a coherent overview....
  33. Thanks - I've actually enjoyed the research. A...

    Thanks - I've actually enjoyed the research. A couple of decades ago this kind of stuff was a pain. Required a trip to an academic library. Now with the internet and availability of journal articles...
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    Hi Kevin, Evidently my post was not clear -...

    Hi Kevin,
    Evidently my post was not clear - Apologies.
    I did Not find the MoleKule effective for VOC reduction. I've provided a snippet of my post concerning the MoleKule below.
    What you need is...
  35. IAQ Fundamentals, VOCs, MoleKule/Carbon Testing

    About a year ago I posted results of VOC testing using the MoleKule and the Austin Air HP+ on HVAC-Talk.
    Due to a server crash all posts were lost. At the same time I was working with MoleKule on a...
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    Thanks - I wasn't aware of that. I also see they...

    Thanks - I wasn't aware of that.
    I also see they are offering MOS technology VOC detectors. This technology, as far as VOCs goes has limitations. I don't know which company's
    chip they are using...
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    Quick note Frank. The only way I know of to see...

    Quick note Frank. The only way I know of to see if the Phenomenal Air is producing both positive and negative ions is with this device - https://www.alphalabinc.com/product/aic/
    The other big...
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    Hi Frank, The post will be here and Reddit....

    Hi Frank,
    The post will be here and Reddit.
    Thanks
    Randy
  39. Replies
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    Hi Frank, The PID meter I used is a...

    Hi Frank,

    The PID meter I used is a ppbRae-3000 see https://www.raesystems.com/products/ppbrae-3000.
    I rent for Pine Environmental. http://www.pine-environmental.com/
    They've got about 30...
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    The Phenomenal Aire device uses GPS hardware. I...

    The Phenomenal Aire device uses GPS hardware. I agree with your impressions. GPS makes all sorts of claims about VOCs with very little to no testing other than repeating the same stories other...
  41. Great paper - thanks. I"ve been looking for...

    Great paper - thanks.
    I"ve been looking for input on this new class of dectector.
  42. For the *average* home - I agree. But not all...

    For the *average* home - I agree. But not all homes are average as I learned the hard way.

    I purchased a condo a couple of years ago. Previous owners didn't vacate for a month after initial home...
  43. The VOC I listed were increased in my residence...

    The VOC I listed were increased in my residence (and there were more). I've tested via Gas Chromatography/Mass spec (the gold standard)
    The 6 vocs Leeds listed are just generic VOCs that are often...
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    Thanks for the report. Cigarette smoke is a...

    Thanks for the report.
    Cigarette smoke is a major issue and I can understand your enthusiasm for the Iwave devices. But cigarette smoke is particulate matter. VOCs, the issue I'm dealing with, are...
  45. Hi Yan, Glad you have chimed in. I've been...

    Hi Yan,
    Glad you have chimed in. I've been looking for someone that has some technical experience with MOS sensors.
    I will try to get a hold of the data sheet fo Sensorion SGP30 you referenced. I'm...
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    Hi, Currently in the middle of another round of...

    Hi,
    Currently in the middle of another round of testing (with the generous assistance of MoleKule) and will let you know soon. I'll try to send you a private message with a more detailed update...
  47. He wasn't talking about a device to improve air...

    He wasn't talking about a device to improve air flow or air quality, he was talking about a device to measure air quality that would indicate when air flow and filter changes would be needed.
    I'm...
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    Unless he has taken before and after test with a...

    Unless he has taken before and after test with a PID meter or gas chromatography/mass spec lab test I don't know how anything conclusive can be determined as for as VOCs are concerned. As I recall...
  49. I'm interested in TVOC measurements and have some...

    I'm interested in TVOC measurements and have some experience using PID meters and gas chromatography. I have not be impressed by MOS technology used in a number of consumer products and offered in...
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    There are 4 categories of devices mentioned in...

    There are 4 categories of devices mentioned in this thread:

    1. Classic Photo Catalytic Oxidation devices. Basically these generate a very strong oxidizing agent - hydroxyl ions. Scientific studies...
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