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Wednesday, December 12, 2018

Simple Techniques for Assessing Airflow in Occupied Spaces


Jeff Burton is a treasure to our profession.  He wrote a piece on ventilation earlier this year and published it in the AIHA Synergist.  I found it to be incredibly valuable.  On the chance that you did not see it, I am reproducing part of it below with his permission.  It is a trove of practical advice born from a lifetime of experience  and a great resource for any practising IH.

One thing the Jeff did not mention but that I think is important is that much of this can be used for exposure modelling input.

I am reproducing the first few paragraph of the article below.  If you are a member of AIHA, you can go to the online version in the Synergist to get it in all its glory at: 

https://www.aiha.org/membercenter/SynergistArchives/2018SynergistArchives/Pages/Six-Ways-to-Approximate-Airflow.aspx

If you are not a member, and you want it for your personal use, you can send me a request (mjayjock@gmail.com) and I will send you the original MS Word document that Jeff sent to me. 

______________________________________________________


Six Ways to Approximate Airflow

Simple Techniques for Assessing Airflow in Occupied Spaces

By D. Jeff Burton

Every occupational health and safety professional must be able to evaluate the air the occupants of a space are experiencing to assess the potential for IAQ problems and their solutions.

Most OHS professionals today are unable to conduct in-depth testing or measurement of HVAC systems and their airflows. Specialized knowledge of testing, measurement, and balancing is often required on the complex systems of today. Industrial hygiene engineers or TAB (testing, adjusting, and balancing) specialists can be employed to make detailed measurements. However, an OHS professional can often gather enough simple information to quickly provide approximate answers to questions about airflow in a space, regardless of the complexity of the system.

This article provides guidelines for simple testing, measurements, and approximations an OHS professional might perform. These include temperature and humidity; air movement and distribution, outdoor air flowrates, and air exchange rates in the occupied space; concentrations of carbon dioxide in the air; and the effects of wind on the airflow through a building.

The following equipment is needed to perform the simple tests and measurements described in this article: tape measure, thermometer, psychrometer, smoke tubes, and carbon dioxide monitor.

...


20 comments:

  1. I'm so exited to share my testimonies about the Good Work of Dr. Udebhu who get me cured from herpes simplex virus (HSV1&2) with his herbs, I never thought that I will live on earth before the year runs out. I have been suffering from herpes, I had spent a lot of money going from one Hospital to another looking for way to get rid of this disease, the hospital have been my home everyday residence. Constant checks up have been my hobby not until this faithful day, I was searching
     through the internet, I saw a testimony on how Dr.Udebhu helped someone in curing his herpes disease using his healing
     Herbs, quickly I copied his email just to give him a test I spoke to him, he told me that he is going to provide the herbal cure to me, which he
    did, after i receive his herbs and i take it as instructed i was cure permanently from herpes my herpes disease was gone. so I decided to share my testimony, that nothing is impossible with God, God use a man to healed me. No matter what you are passing through, no matter how deadly the sickness is and no matter what the situation is God that did mine is still going to do yours, people suffering from herpes, brain tumor, kidney disease, pcos, AIDS, ALS,copd, asthma, athritis,herpes, Cancer,Hpv, any kind of disease, you can rich him now via ? Gmail address: drudebhuherbalhome@gmail.com or whatsapp +2349051254152  

    ReplyDelete
    Replies
    1. Never give up in life they all say no cure to HSV 2 which is a big lie I have pass through many process also i never believe there is really cure to HERPES until I meet Dr.Ehiaguna the doctor that have been helping many people for many years, I come across this doctor online when I was searching for cure online I found out about this man, and to my greatest surprise this man have the herbal medicine which I have been looking for years I explain my problem to him through the email I found on someone who testify about him also, Dr.Ehiaguna write me a reply and explain how the process work so after ordering for the medicine I got it within 4 days and I took it according to the way Dr.Ehiaguna instructed, I was so happy after two week I took the medicine there was very big change in my health when I was done with the process I go for test, I found out I am negative that was the day I have the tears of joy you can also get in contact with my doctor through his email now drehiaguna@gmail.com or you can also WhatsApp him +2348073908953. And He also have herbs medicine to cured the following diseases; eczema,urethra wart,chronic problems.Herpes, Cancer, Als,Hepatitis, Diabetes, HPV,Infections,ulcer  ETC

      Delete
    2. Greetings to everyone reading this testimony, I am Dan Morgan, i am here to
      testify of a great man who was able to cure me permanently from herpes
      Disease just with his herbal medicine,i have been herpes Positive for 5
      years before i came across Dr voodoo Email on the internet on how he has
      been using his herbal medicine to treat and cure patients from different
      virus, so i contacted him and i explain to him concerning my problem, i
      followed up with the instructions he gave me and he urge me to have faith
      in his words that he was going to restore my health back, after some couple
      of days Dr voodoo sent me some medicine which he gave me prescription on
      how to take for 2 weeks, to make the long story short, I have been
      confirmed Negative from my recent test in the hospital, just within 2 weeks
      Dr voodoo was able to make me healthy and see reasons to live again, though
      science says there is no cure, i believe God has sent this great man to
      save people, you can all contact him for his medicine, he has presently
      been treating diseases like,CANCER,BLOOD DISEASE,DIABETES,HIV,TYPHOID, and
      many others, you can contact this man on voodoospelltemple66@gmail.com.or
      add him on whatsApp +2348140120719, God
      Bless you sir!

      Delete
    3. Good evening to you all I want to write a shortly message to the world how doctor ehiaguna help with his great herbal medicine to cured me from this horrible virus HSV 1 and 2 I get his email from someone name Olivia mason how she was also cured by doctor ehiaguna I never believe there was cure until I meet her testimony, I contacted doctor ehiaguna I don’t believe there was cure well I am so happy to write this testimony to the world, this man immediately when I sent him email and this man response within 20 minus and give me the necessary process and the herbal was sent to within 4 day I took it according to the instruction so with 2 week I was completely cured and I get my test done I was confirm negative I am so happy if you want to get his contact you can message him with this email drehiaguna@gmail.com or you can also WhatsApp him +2348073908953 he can fix this.HIV.HEPATITIS.ANTHRAX.HPV.CANCER.ALSAND ALSO SOLVE YOUR RELATIONSHIP PROBLEM

      Delete
    4. Thank God for my life cuz i'm a living testimony today because i'm free from (GENITAL HERPES). Last year I started on COPD formula treatment from Dr Shaibu Abacha herbs foundation, the treatment worked incredibly for my lungs condition. I used the herbal treatment for almost A months, it reversed my chronic obstructive pulmonary disease, which is also known as (HERPES DISEASES). My severe shortness of breath, dry cough, low energy, fatigue, chest tightness and others gradually disappeared with the help of Dr. Shaibu Abacha herbal treatment. I'm so happy for my life and grateful to Dr.Shaibu for his Awesome work. Visit Dr.Shaibu Abacha herbs foundation official today at drshaibuabacha@gmail.com.OR whatsApp on +2349061521409. This COPD treatment has improved the quality of my life greatly, i breath much better and feel comfortable doing so!... thanks once again Dr. shaibu Abacha, you can also contact him  for other kinds of illness....Do not hide your sickness so your sickness will not hide you.

      Delete
    5. [ ***** Multiple Testimonials by Dr .ISE Medicinal ******]
      Natural herbs have cured so many illnesses that drugs and injections can’t cure. I've seen the great importance of natural herbs and the wonderful work they have done in people's lives. I read people's testimonies online on how they were cured of herpes, hiv, and diabetics so I decided to contact the DR.ISE because I know nature has the power to heal anything. I was diagnosed with HIV for the past 9 years , I was cured by DR.ISE with his herbs and I referred my family members and friends immediately because they were both suffering from herpes , they were cured and completely healed .I know it is hard to believe but I am a living testimony. He also has the natural herb to cure cancer and many illnesses .

      ***Experience report on herpes treatment. I have been diagnosed with genital herpes for 2 years and am looking for a cure. I read a testimony on this platform from a woman who was cured of diabetes with BY ISE Herbal Medicine, including the doctor's official email address. I contacted the doctor through his email, after much discussion and some questions he prepared herbal medicine and asked for my address. 3 days later, I received the herbal medicine and with his prescription, I drank the herbal medicine for 10 days. After I finished herbal medicine, I went for a test and my IgG result was confirmed negative with no virus found in my blood.
      **Alicewood Wood Alice; what a happy woman I am now I'm free from HIV. also cure DIABETES.thank you so much dr.ISE I will never forget you in my life even in my next life I will continue to tell people about you Dr.ISE God continue to bless you forever contact him for any kind of spell through

      **Liya Ailin; Please read and share for others to know that there is cure for herpes1&2

      "* my name is Tinal edwin, I WANT TO SHARE MY EXPERIENCE OF HOW I WAS CURED FROM CANCER USING Dr.ISE HERBAL MEDICINE
      DR.ISE.
      via:
      His contacts are; cureherbal633@gmail.com. or
      isespiritualspelltemple@gmail.com
      Whats-app: +234-815-197-8888 or +234-901-827-4417 or +351924365160

      Delete
  2. Never give up in life they all say no cure to HSV 2 which is a big lie I have pass through many process also i never believe there is really cure to HERPES until I meet Dr.Ehiaguna the doctor that have been helping many people for many years, I come across this doctor online when I was searching for cure online I found out about this man, and to my greatest surprise this man have the herbal medicine which I have been looking for years I explain my problem to him through the email I found on someone who testify about him also, Dr.Ehiaguna write me a reply and explain how the process work so after ordering for the medicine I got it within 4 days and I took it according to the way Dr.Ehiaguna instructed, I was so happy after two week I took the medicine there was very big change in my health when I was done with the process I go for test, I found out I am negative that was the day I have the tears of joy you can also get in contact with my doctor through his email now drehiaguna@gmail.com or you can also WhatsApp him +2348073908953. And He also have herbs medicine to cured the following diseases; eczema,urethra wart,chronic problems.Herpes, Cancer, Als,Hepatitis, Diabetes, HPV,Infections,ulcer  ETC

    ReplyDelete
  3. I want to write a little testimony about the good work of doctor ehiaguna who cured me from Hsv 1 and 2 for just 2 week with his herbal medicine, I never believe I can be normal again and have a good life like others I always regretted the day I got diagnose with the virus, I was lost of hope when my doctor told me there is no cure for it but I keep thinking and thinking about my future, if I can have kids of my own well I am so grateful for my helper who get me cured with his herbal medicine, I go online in search of anything that can help me because I can’t deal with it forever so I found this doc ehiaguna email on a blog of someone who was cured by him I quickly contact him for help and explain all my pain to him, he told me not to worry about it there is cure for real, I never believe until he send me the herbal medicine when I order for it and I have it within 4 days that is how I took the medicine for 2 week and the following week I go for test just to confirm I was 100% cured from this sickness what a miracle in my life I am so happy right now, you can also get in contact with him if you have such sickness through drehiaguna@gmail.com and also WhatsApp him +2348073908953... And He also have herbs medicine to cured the following diseases; eczema,urethra wart,chronic problems.Herpes, Cancer, Als,Hepatitis, Diabetes, HPV,Infections,ulcer  ETC

    ReplyDelete
  4. Hello viewers in the world am here to share my experience on how I got cured from Herpes through the help of Dr Adigba who use his roots and herbs to cure my Herpes today am healthy and strong once again all thanks to you Dr. may you live long to continue the good work you started, as many of you out there looking for solution to your problems I will like you to give dradigba@gmail.com A try today add him on whatsapp +2348077875210

    ReplyDelete
  5. Good evening to you all I want to write a shortly message to the world how doctor ehiaguna help with his great herbal medicine to cured me from this horrible virus HSV 1 and 2 I get his email from someone name Olivia mason how she was also cured by doctor ehiaguna I never believe there was cure until I meet her testimony, I contacted doctor ehiaguna I don’t believe there was cure well I am so happy to write this testimony to the world, this man immediately when I sent him email and this man response within 20 minus and give me the necessary process and the herbal was sent to within 4 day I took it according to the instruction so with 2 week I was completely cured and I get my test done I was confirm negative I am so happy if you want to get his contact you can message him with this email drehiaguna@gmail.com or you can also WhatsApp him +2348073908953 he can fix this.HIV.HEPATITIS.ANTHRAX.HPV.CANCER.ALSAND ALSO SOLVE YOUR RELATIONSHIP PROBLEM

    ReplyDelete
  6. I never thought that there will be a miracle on the internet until i came in contact with Priest Babaka, finally i made it with his help, with his spiritual power which was recommended by a lady in baby center he help before, i never believe it was real until i confirm it now because i have tried so many things to make sure i get pregnant but no luck, immediately i contact him. he did some spiritual prayers and send me a medicine which i took, i got pregnant three weeks after, and i now have a son to show. thank you so much priest and i recommend Priest Babaka for everyone out there that is willing to have a child of her own out there. contact him for help too he is real and powerful, i have confirmed it, contact him on email: babaka.wolf@gmail.com or Facebook at priest.babaka










    I never thought that there will be a miracle on the internet until i came in contact with Priest Babaka, finally i made it with his help, with his spiritual power which was recommended by a lady in baby center he help before, i never believe it was real until i confirm it now because i have tried so many things to make sure i get pregnant but no luck, immediately i contact him. he did some spiritual prayers and send me a medicine which i took, i got pregnant three weeks after, and i now have a son to show. thank you so much priest and i recommend Priest Babaka for everyone out there that is willing to have a child of her own out there. contact him for help too he is real and powerful, i have confirmed it, contact him on email: babaka.wolf@gmail.com or Facebook at priest.babaka

    ReplyDelete
  7. Some years ago I was tested herpes positive and ever since then i have been taking different kinds of medicine but yet no improvement until i saw testimonies on the internet of how Dr.enabor has been curing different people from different kinds of diseases, immediately i contacted him. After our discussion he prepared the medicine and send it to me, which i received and took according to his instructions. Now my doctor just confirmed me herpes negative. My heart is so filled with joy, thank you so much Dr.dr enabor for curing me. If you are reading this and you are suffering from herpes or any other disease you can contact dr enabor on this Email address: drenaborsunday333324@gmail.com or you whatsapp him on +2349055485586

    . He is a honest man 

    ReplyDelete
  8. Some years ago I was tested herpes positive and ever since then i have been taking different kinds of medicine but yet no improvement until i saw testimonies on the internet of how Dr.lucky has been curing different people from different kinds of diseases, immediately i contacted him. After our discussion he prepared the medicine and send it to me, which i received and took according to his instructions. Now my doctor just confirmed me herpes negative. My heart is so filled with joy, thank you so much Dr.lucky for curing me. If you are reading this and you are suffering from herpes or any other disease you can contact Dehichioya on this Email address: drlucky980 @gmail.com or you whatsapp him on +2348107232053

    . He is a honest man

    ReplyDelete
  9. Some years ago I was tested herpes positive and ever since then i have been taking different kinds of medicine but yet no improvement until i saw testimonies on the internet of how Dr.lucky has been curing different people from different kinds of diseases, immediately i contacted him. After our discussion he prepared the medicine and send it to me, which i received and took according to his instructions. Now my doctor just confirmed me herpes negative. My heart is so filled with joy, thank you so much Dr.lucky for curing me. If you are reading this and you are suffering from herpes or any other disease you can contact Dehichioya on this Email address: drlucky980 @gmail.com or you whatsapp him on +2348107232053

    . He is a honest man

    ReplyDelete
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  11. DR OSEMU CURED ME FROM HERPES I have been suffering from (HERPES) disease for the last four years and had constant pain, especially in my knees. During the first year, I had faith in God that I would be healed someday.This disease started to circulate all over my body and I have been taking treatment from my doctor, a few weeks ago I came on search on the internet if I could get any information concerning the prevention of this disease, on my search I saw a testimony of someone who has been healed from (HIV and Cancer) by this Man DR OSEMU and she also gave the email address of this man and advise we should contact him for any sickness that he would be of help, so I wrote to DR OSEMU telling him about my (HERPES) he told me not to worry that I was going to be cured!! hmm i never believed it,, well after all the procedures and remedy given to me by this man few weeks later I started experiencing changes all over me as the DR assured me that I have cured, after some time i went to my doctor to confirmed if I have been finally healed behold it was TRUE, So friends my advice is if you have such sickness or any other at all you can email DR OSEMU on(drosemusolutionhome@gmail.com sir I am indeed grateful for the help I will forever recommend you to my friends!!! with your lovely Email Address (drosemusolutionhome@gmail.com or you can also WhatsApp him on this number +2348075522105 

    ReplyDelete
  12. Hello viewers I am glad to have met with the powerful herbal healer called
    Dr voodoo who use his herbs to cure my HIV disease I suffered from 15years,
    but now I am a happy woman and i am free from this sickness that has been
    problem to my living, after using Dr voodoo herbal medicine within 1week i
    was diagnose negative, I will recommend Dr voodoo to everyone reading this
    article because this herbal healer is capable to heal anything, the
    scientist said has no cure, Email him : voodoospelltemple66@gmail.com or
    add Dr voodoo on whatsApp: +2348140120719

    ReplyDelete
  13. MY HIV HEALING TESTIMONY

    My mouth is short of words, i am so happy because Dr voodoo has healed me
    from HIV which i have been suffering from the past 5years now, i have
    spend a lot when getting drugs from the hospital to keep me healthy, i have
    tried all means in life to always i can become HIV negative one day, but
    there was no answer until i found Dr voodoo the parish of African who
    provide me some healing herbs that i uses , now i am glad telling everyone
    that i am now HIV Negative, i am very happy, thank you Dr voodoo for
    helping my life comes back newly without any form of crisis, may the good
    lord that i serve blessed you Dr voodoo and equip you to the higher grade
    for healing my life. i am so amazed. so i will announced to everyone in
    this whole world that is HIV positive to please follow my advice and get
    healed on time, because we all knows that HIV disease is a deadly
    type,contact Dr voodoo for your HIV healing herbs today at:
    voodoospelltemple66@gmail.com He will be always happy to assist you
    online and ensure you get healed on time, contact Dr voodoo today for
    your healing hearbs immediately, you can also
    add him on whatsApp +2348140120719 thank you sir.

    ReplyDelete
  14. Getting rib of Herpes virus wasn't easy, I came across Dr voodoo on how he
    has cured so many people from herpes and other illness so I decided to give
    him a try, now am permanently cured using the natural herbs medication and
    cleansing supplement sent by Dr voodoo no more herpes, contact Dr voodoo
    WhatsApp number +2348140120719 also e-mail him at:
    voodoospelltemple66@gmail.com

    ReplyDelete


  15. I am so delighted to be completely cured of Herpes Simplex Virus 1/2. After having it since March 4th of 2022. I did some online research when I came Across Herbalist Irene Herbal Exploits. I was amazed😊 when I Came across some of his Works And those he has helped, I decided to Contact him For help, Which He Kindly did Wholeheartedly❤❤, I am glad 🥰To be finally healed Of HSV 1/2 through Herbalist Irene Traditional Herbal Mixture☘☘. Email him on : drireneherbalcure@gmail.com
    WhatsApp : +2348078793935.

    ReplyDelete