The Effect of Varying Levels of OutdoorAir Supply on the Symptoms of Sick Building Syndrome Teacher Dr OA Pekau ID: 597491
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BCEE 6961
The Effect of Varying Levels of Outdoor-Air Supply on the Symptoms of Sick Building Syndrome
Teacher : Dr. O.A. Pekau Dr. James Hanley
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2015Slide2
The Effect of Varying Levels of Outdoor-Air Supply
on the Symptoms of Sick Building Syndrome
Study Conducted
2Conducted by Massachusetts Medical Society NO, by the au’s. Medical Society PUBLISHES NEJMDuration of 6 Weeks in 4 Buildings…
Opposite Ventilation Rates in 2 BuildingsVentilation Increased for 1st Week & Decreased for 2nd Reverse the prev. 2 bullets20 or 50 cu.ft. per minute per person 1546 Participants, serving their own comparison
Carbon dioxide concentration around 600 or 1000ppm
V short Intro helpful to situate the study. WHY was study done?Slide3
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Obtaining Feedback
1. Carbon dioxide levels 8 to 12 sites per floorLevels taken Mid Afternoon at pts. nearest to Participants2. Questionnaire
Were Done administered to workers 3. Levels of formaldehyde, nitrogen oxides, carbon monoxide, total airborne dust etc were checkedMEASUREMENTS During the Study
The Effect of Varying Levels of Outdoor-Air Supplyon the Symptoms of Sick Building SyndromeSlide4
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Obtained Feedback
Participants proposed difficulties ??? Wording is oddIrritation in eyes, nose and throat what about it ? Wasn’t that assessed DURING study
More on the days of High Ventilation ??? Seems like a result, but what was more? Logistic Regression was used to avoid odds ???? VERY ODD .. Read againAfter the Study ???
The Effect of Varying Levels of Outdoor-Air Supplyon the Symptoms of Sick Building SyndromeSlide5
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Result
Logistic Regression was used to??? many times … part of MeTHODS, not result
No Association OF WHAT? with carbon dioxide, humidity, temperature or air velocityBut association of WHAT? with environmental ratings was found. Details? Not much info as writtenResults of the Study
The Effect of Varying Levels of Outdoor-Air Supplyon the Symptoms of Sick Building SyndromeSlide6
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Facts???
About the Study
The Effect of Varying Levels of Outdoor-Air Supplyon the Symptoms of Sick Building SyndromePossible Interferences <- meaning of this word?Some participants were aware of the ventilation conditions. SO?
The buildings maynot be sick were chosen randomly. Correct. And important criticism, but put more cogentlyNew bBuildings with new furnishings have increased concentrations of contaminants so increasing outdoor air supply maybe beneficial
for THEM
Parameter to measure Indoor Air Quality was Carbon dioxide
which is just 13% of total contaminants in the air inside a building
Some work spaces were not air tight and were receiving outdoor airSlide7
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Thank you for
your attention !How do you
know audience was paying attaention, and not just checking Facebook?Questions - Answers
Could be crisper.. Did you try out your STORY on others ?