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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. 

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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.

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12 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. 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

      Delete
    3. 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
    4. 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
  2. I Never believed i was ever going to be HSV FREE again, DR.Ehiaguna has given me reasons to be happy, i was HSV positive for 2 years and all the means and medicine i tried for treatment was not helpful to me, but when i came on the Internet i saw great testimony about DR.Ehiaguna on how he was able to cure someone from HSV 2, this person said great things about this man, and advice we contact him for any Disease problem that DR.Ehiaguna can be of help, well i decided to give him a try, he requested for my information which i sent to him, and he told me he was going to prepare for me a healing portion, which he wanted me to take for days, and after which i should go back to the hospital for check up, well after taking all the treatment sent to me by DR.Ehiahuna , i went back to the Hospital for check up, and now i have been confirmed HSV NEGATIVE, friends you can reach DR.Ehiaguna on any treatment of any Disease cos i saw many testimony of different disease like, HEPATITIS,HIV AIDS,EPILEPSY, CANCER,CFS he is the one only one i can show you all up to, reach him on drehiaguna@gmail.com or whatsApp him now +2348073908953. quick contact him for help and you can just quickly drop your number on your first mail as i did for easily conversation

    ReplyDelete
  3. 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
  4. 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
  5. 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
  6. I AM SO VERY HAPPY TODAY!!! That is why am giving this big thanks to Dr. sikama for curing me from HERPES. I have been suffering from HERPES for the past six (6)years and i tried everything possible to get myself cured but i could’nt get any solution! until i decided to try herbal cure. That was how i got in contact with this great herbal doctor in an online research, i contacted him and demand for the cure and he send me the cure through UPS and gave me instructions on how to use it and after one week of taking the herbal medicine of Dr sikama i went to the hospital for check and to God be the glory i tested HERPES negative, (I am so glad to see myself HERPES negative once again). I’m very proud to express my happiness through this platform and to say a big thanks to Dr. sikama for restoring my life back to normal. You can as well contact Dr. sikama via email: drsikama@gmail.com or you can call and WhAtsapp him on +2348130725051 if you are infected with HERPES virus or having any health problems you can contact Dr. sikama and he will help you. DOCTOR SIKAMA CAN AS WELL CURE THE FOLLOWING DISEASE:1. HIV/AIDS
    2. HERPES
    3. CANCER of all kind
    4. HSV 1&2
    5. Herpatitis B
    6.Diabetes
    7.HPV
    8.COPD (Chronic Obstructive Pulmonary Disease)
    9.Asthma10.Acute angle-closure Glaucoma
    11.Sickle cell
    12.CHRONIC PANCREATITIS Dr. sikama is capable of curing any type of diseases with his herbal medicine.  etc

    ReplyDelete
  7. 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
  8. 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