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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.

...


15 comments:

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    1. Life has not been so easy for me, i almost gave up on getting cured of HSV2 because i have tried many treatment and still don't work for me, so i was going place to place just for me to search for herbs cure or any solution to my problem and i also have three kids to take care of, that same period my husband die in an accident on it way coming home so life was very tough for me, so when i was going through the herbs site to find a cure for my problem i saw a story about a lady testify about DR.Imoudu, so i said to my self let me give a try to see if my problem can be solved, because i have spend alot of money In the hospital and their was no cure for it, so i contacted DR.Imoudu that afternoon of it and he gave me instruction how i will go about it and he sent me a herbal medicine which I took according to the way he instructed me to do. After taking the medicine for two weeks i saw a changes on my body, then i called the Dr and told him about it and he said i should go for test. i can't believe when my result came out it was negative, i was very happy to share this great testimony to the world there is real cure for #herpes you can also contact DR.Imoudu Email: DR.IMOUDUHEALERTEMPLE@GMAIL. COM also WhatsApp him +2348109609753..
      He also have herbs medicine to cured the following diseases;
      Diabetes, Lupus, Gout, Hepatitis A,B, Infertility, HIV/AIDS, CANCER, WART,ALS CURE/DIABETES CURE/EPILEPSY/HPV CURE/LOOSE WEIGHT AND BODY/EX-BACK/stroke

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    2. Dr Oduku herpes treatment is one of the most effective home remedies for herpes which has the ability to kill the herpes virus permanently. I found out I had herpes 4 years ago. My first outbreak was definitely the worst thing I ever experienced. The bumps and blisters were swollen and red. I had a doctor give me Valtrex but I take the generic. I had to take the Valtrex 1 gram a day for about a week and I had another doctor prescribe me Acyclovir but that gave me the worst headaches ever, so I stopped taking it.after 2 year all that prove abortive the herpes was still there,
      Since I was first diagnosed I have about 2 outbreaks a month. I have been able to cope with this by having supportive family and friends who look out for me,though it wasnt easy for me, one day i read a post by someone testifying about Dr  Oduku that she was cured totally using his herbal product, i decided to gave it a try, I contacted him as instructed in the testimony. i made request for the herbal medicine, he actually did send it to me and gave me the instruction on how i will use it,
      The good news is this, i went to the hospital after the medication for test as instructed by Dr Oduku, i was tested negative, i was suprised finding out that am now herpes virus negative against my former result which was positive, Am happy to let the whole world know that today am free from this herpes disease,
      no more outbreak, no more cold sores, excruciating pains, i will advice anyone reading this message  and needed a cure for herpes as well should please contact this Great Dr Oduku on drodukuherbalhealingcentre@gmail.com or WhatsApp +2348124765093

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      Here is my private e-mail tracylee688@gmail.com you can also get in touch with me.

      Delete
    3. Dr Oduku herpes treatment is one of the most effective home remedies for herpes which has the ability to kill the herpes virus permanently. I found out I had herpes 4 years ago. My first outbreak was definitely the worst thing I ever experienced. The bumps and blisters were swollen and red. I had a doctor give me Valtrex but I take the generic. I had to take the Valtrex 1 gram a day for about a week and I had another doctor prescribe me Acyclovir but that gave me the worst headaches ever, so I stopped taking it.after 2 year all that prove abortive the herpes was still there,
      Since I was first diagnosed I have about 2 outbreaks a month. I have been able to cope with this by having supportive family and friends who look out for me,though it wasnt easy for me, one day i read a post by someone testifying about Dr  Oduku that she was cured totally using his herbal product, i decided to gave it a try, I contacted him as instructed in the testimony. i made request for the herbal medicine, he actually did send it to me and gave me the instruction on how i will use it,
      The good news is this, i went to the hospital after the medication for test as instructed by Dr Oduku, i was tested negative, i was suprised finding out that am now herpes virus negative against my former result which was positive, Am happy to let the whole world know that today am free from this herpes disease,
      no more outbreak, no more cold sores, excruciating pains, i will advice anyone reading this message  and needed a cure for herpes as well should please contact this Great Dr Oduku on drodukuherbalhealingcentre@gmail.com or WhatsApp +2348124765093

      Visit his website: https://drodukuherbalhealingcentre.weebly.com

      https://dr-oduku-herbal-healing-centre.business.site

      https://drodukuherbscure.blogspot.com/

      Dr Oduku is the best herbal doctor.


      Here is my private e-mail tracylee688@gmail.com you can also get in touch with me.

      Delete
    4. i already gave up on ever getting cured of HSV2 because i have try many treatment none of them work out for me i have go to different hospital they always tell me same thing there is no cure for herpes when i came across a post about Dr ohunyom, in the net from a lady called Angela i contacted him and he reassured me with him herbal medicine which i took according to the way he instructed, that how i was cured. I doubted at first because i have been to a whole lot of reputable doctors, tried a lot of medicines but none was able to cure me. so i decided to listen to him and he commenced treatment, and under two weeks i was totally fee from #Herpes. i want to say a very big thank you to DR ohunyom for what he has done in my life. feel free to leave him a message on email drohunyom@gmail.com and also WhatsApp him +2349060579973..
      He can still be able to help you with this herbs medicine:
      1...ALS CURE/DIABETES CURE/EPILESY/HPV CURE/LUPUS/HEPATITIS/CANCER/GOUT  

      Delete
    5. I'm here to testify about the great work Dr okosun did for me. I have been suffering from (HERPES) disease for the past 4 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 circulating all over my body and i have been taking treatment from different doctors, few weeks ago i came across lots of testimonies from different people on a particular doctor on the internet called Dr okosun on how he cured various people from Herpes Simplex Virus and other diseases. i took the email address of this man from one of the testifiers advising anybody to contact him for help for any kind of sickness that he would be of help, so I emailed him telling him about my (HERPES Virus) he told me not to worry that i was going to be cured! , well after all the procedures and remedy given to me by this man few weeks later i started experiencing changes all over me as Dr okosun assured me that i will be cured,after two week of taking his medication as told by dr okosun, i went to my doctor for herpes virus check up and behold i was declared negative, i also waited for a week and went to another hospital for another check up to be be truly sure and behold i was still declared herpes negative, And i want to use this opportunity to tell those people out there secretly suffering from herpes or other diseases should contact dr okosun and get cured. you can get in touch with this doctor via email : drokosun55@gmail.com. You can also whatsapp him +2348124363791. Thanks once again Dr okosun god bless you

      Delete
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  3. Hiv disease for the last 3 years and had pain hard to eat and cough are nightmares,especially the first year At this stage, the immune system is severely weakened, and the risk of contracting opportunistic infections is much greater. However, not everyone with HIV will go on to develop AIDS. The earlier you receive treatment, the better your outcome will be.I started taking ARV to avoid early death but I had faith in God that i would be healed someday.As a Hiv patent we are advise to be taking antiretroviral treatments to reduce our chance of transmitting the virus to others , few weeks ago i came on search on the internet if i could get any information on Hiv treatment with herbal medicine, on my search i saw a testimony of someone who has been healed from Hiv her name was Achima Abelard and other Herpes Virus patent Tasha Moore also giving testimony about this same man,Called Dr Itua Herbal Center.I was moved by the testimony and i contacted him by his Email.drituaherbalcenter@gmail.com We chatted and he send me a bottle of herbal medicine I drank it as he instructed me to.After drinking it he ask me to go for a test that how i ended my suffering life of Hiv patent,I'm cured and free of Arv Pills.I'm forever grateful to him Drituaherbalcenter.Here his contact Number +2348149277967...He assure me he can cure the following disease..Hiv,Cancer,Herpes Virus,Lyme Disease,Epilepsy, ,Bladder Cancer,Colorectal Cancer,Breast Cancer,Kidney Cancer,Leukemia,Lung Cancer,Non Hodgkin Lymphoma,Skin Cancer,Lupus,Uterine Cancer,Prostate Cancer, fibromyalgia ,ALS,Hepatitis,Copd,Parkinson disease.Genetic disease,Fibrodysplasia disease,Fibrodysplasia Ossificans Progressiva,Fluoroquinolone Toxicity Syndrome,Liver/Kidney Inflammatory,Men/Woman infertility, bowel disease ,Huntington's disease ,Diabetes,Fibroid...

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  4. Herpes is a serious and recurring disease which can't be cured through drugs or injections by the American doctors but the best way to deal with Herpes is by taking natural herbs medicine for it,  I have read about DR EDIDIA the great herbalist doctor who cure me from herpes  with his powerful herbal medicine.  i contacted him to know how he can help me and he told me never to worrythat he will help me with the natural herbs from God!after 2 days of contacting him, he told me that the cure has been ready andhe sent it to me via UPS SPEED POST and it got to me after 3 days!i used the medicine as he instructed me (MORNING and EVENING) and i wascured!its really like a dream but i am so happy!   for the people suffering from the following diseases, Cancer, hypothyroidism, Herpes, COPD, HIV, Arthritis, Hpv, Infections,Liver Disease, Autoimmune Diseases, Parkinson's disease,Lupus Canker sore and more should contact him for his herbal medicine because i am a living testimony and i was cured of herpes and his medicine is legit.  i sent him what he requested and he sent me his medicine which i took for 3 good weeks and today am out here with negative result. when i went for test i was so happy after going through his medication. you can reach him through his email dredidiaherbalhome@gmail.com or call whatsapp number:+2349074505296 he will help you out.  here is the Dr website http://dredidiaherbalhome.weebly.com/ https://dr-edidia-herbal-home.business.site/ also visit my facebook pages https://www.facebook.com/dredidiaherbs/?modal=admin_todo_tour OR https://www.facebook.com/HIV-CURE-1359918664158191/?modal=admin_todo_tour  blogs pages https://naturaltreatmentherpes.blogspot.com/ https://besherpestreatment.blogspot.com/

    I,m rosesharon and you can get intouch with me via rosesharon915@gmail.com  also view website to know him.

    ReplyDelete
  5. Herpes is a serious and recurring disease which can't be cured through drugs or injections by the American doctors but the best way to deal with Herpes is by taking natural herbs medicine for it,  I have read about DR EDIDIA the great herbalist doctor who cure me from herpes  with his powerful herbal medicine.  i contacted him to know how he can help me and he told me never to worrythat he will help me with the natural herbs from God!after 2 days of contacting him, he told me that the cure has been ready andhe sent it to me via UPS SPEED POST and it got to me after 3 days!i used the medicine as he instructed me (MORNING and EVENING) and i wascured!its really like a dream but i am so happy!   for the people suffering from the following diseases, Cancer, hypothyroidism, Herpes, COPD, HIV, Arthritis, Hpv, Infections,Liver Disease, Autoimmune Diseases, Parkinson's disease,Lupus Canker sore and more should contact him for his herbal medicine because i am a living testimony and i was cured of herpes and his medicine is legit.  i sent him what he requested and he sent me his medicine which i took for 3 good weeks and today am out here with negative result. when i went for test i was so happy after going through his medication. you can reach him through his email dredidiaherbalhome@gmail.com or call whatsapp number:+2349074505296 he will help you out.  here is the Dr website http://dredidiaherbalhome.weebly.com/ https://dr-edidia-herbal-home.business.site/ also visit my facebook pages https://www.facebook.com/dredidiaherbs/?modal=admin_todo_tour OR https://www.facebook.com/HIV-CURE-1359918664158191/?modal=admin_todo_tour  blogs pages https://naturaltreatmentherpes.blogspot.com/ https://besherpestreatment.blogspot.com/

    I,m rosesharon and you can get intouch with me via rosesharon915@gmail.com  also view website to know him.

    ReplyDelete
  6. Life has not been so easy for me, i almost gave up on getting cured of HSV2 because i have tried many treatment and still don't work for me, so i was going place to place just for me to search for herbs cure or any solution to my problem and i also have three kids to take care of, that same period my husband die in an accident on it way coming home so life was very tough for me, so when i was going through the herbs site to find a cure for my problem i saw a story about a lady testify about DR.Imoudu, so i said to my self let me give a try to see if my problem can be solved, because i have spend alot of money In the hospital and their was no cure for it, so i contacted DR.Imoudu that afternoon of it and he gave me instruction how i will go about it and he sent me a herbal medicine which I took according to the way he instructed me to do. After taking the medicine for two weeks i saw a changes on my body, then i called the Dr and told him about it and he said i should go for test. i can't believe when my result came out it was negative, i was very happy to share this great testimony to the world there is real cure for #herpes you can also contact DR.Imoudu Email: DR.IMOUDUHEALERTEMPLE@GMAIL. COM also WhatsApp him +2348109609753..
    He also have herbs medicine to cured the following diseases;
    Diabetes, Lupus, Gout, Hepatitis A,B, Infertility, HIV/AIDS, CANCER, WART,ALS CURE/DIABETES CURE/EPILEPSY/HPV CURE/LOOSE WEIGHT AND BODY/EX-BACK/stroke

    ReplyDelete
  7. i already gave up on ever getting cured of HSV2 because i have try many treatment none of them work out for me i have go to different hospital they always tell me same thing there is no cure for herpes when i came across a post about Dr ohunyom, in the net from a lady called Angela i contacted him and he reassured me with him herbal medicine which i took according to the way he instructed, that how i was cured. I doubted at first because i have been to a whole lot of reputable doctors, tried a lot of medicines but none was able to cure me. so i decided to listen to him and he commenced treatment, and under two weeks i was totally fee from #Herpes. i want to say a very big thank you to DR ohunyom for what he has done in my life. feel free to leave him a message on email drohunyom@gmail.com and also WhatsApp him +2349060579973..
    He can still be able to help you with this herbs medicine:
    1...ALS CURE/DIABETES CURE/EPILESY/HPV CURE/LUPUS/HEPATITIS/CANCER/GOUT  

    ReplyDelete
  8. I'm here to testify about the great work Dr okosun did for me. I have been suffering from (HERPES) disease for the past 4 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 circulating all over my body and i have been taking treatment from different doctors, few weeks ago i came across lots of testimonies from different people on a particular doctor on the internet called Dr okosun on how he cured various people from Herpes Simplex Virus and other diseases. i took the email address of this man from one of the testifiers advising anybody to contact him for help for any kind of sickness that he would be of help, so I emailed him telling him about my (HERPES Virus) he told me not to worry that i was going to be cured! , well after all the procedures and remedy given to me by this man few weeks later i started experiencing changes all over me as Dr okosun assured me that i will be cured,after two week of taking his medication as told by dr okosun, i went to my doctor for herpes virus check up and behold i was declared negative, i also waited for a week and went to another hospital for another check up to be be truly sure and behold i was still declared herpes negative, And i want to use this opportunity to tell those people out there secretly suffering from herpes or other diseases should contact dr okosun and get cured. you can get in touch with this doctor via email : drokosun55@gmail.com. You can also whatsapp him +2348124363791. Thanks once again Dr okosun god bless you

    ReplyDelete
  9. Hello, everyone! I,m here to explore blogs and forum about the wonderful and most safe cure for (Herpes Virus).I was positive to the deadly virus called herpes and i lost hope because i was out casted and rejected even by my closet friends.i searched on-line to know and enquirer about cure for Herpes and i read someone testimony on how he was cured from Herpes so i decided to contact the same herbalist because i know that nature has the power to heal everything.i contacted him to know how he can help me and he told me never to worry that he will heal me with the natural herbs from God!after 2 days of contacting him, he told me that the cure has been ready and he sent it to me via DHL and it got to me after 3 days!i used the med as he instructed me (MORNING and EVENING) and i was cured!its really like a dream but i am so happy!thats the reason i decided to also add more comment of Him so that more can be saved just like me!and if you need his help, you can email him on nativehealthclinic@gmail.com, Instagram IG: @dremmanuel2 or whatsapp +2348140073965 I,m neme amber and you can get in touch with me via nemeamber@gmail.com..Contact him for help at Herpes virus HIV/AIDS CANCER COPD BRAIN TUMOR All kind of virus and disease

    ReplyDelete