The following studies in office environments found that IAQ impacted cognitive performance and productivity, and that CO2, once thought to be benign, has a substantive impact as well.
Environmental Health Perspectives: (October 2015)
Joseph G. Allen,1 Piers MacNaughton,1 Usha Satish,2 Suresh Santanam,3 Jose Vallarino,1 and John D. Spengler1
1Exposure, Epidemiology, and Risk Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA; 2Psychiatry and Behavioral Sciences, SUNY-Upstate Medical School, Syracuse, New York, USA; 3Industrial Assessment Center, Center of Excellence, Syracuse University, Syracuse, New York, USA
Usha Satish,1 Mark J. Mendell,2 Krishnamurthy Shekhar,1 Toshifumi Hotchi,2 Douglas Sullivan,2 Siegfried Streufert,1 and William J. Fisk2
1Department of Psychiatry and Behavioral Science, Upstate Medical University, State University of New York, Syracuse, New York, USA; 2Indoor Environment Department, Lawrence Berkeley National Laboratory, Berkeley, California, USA
Indoor Air Journal, vol. 18, pp 28-36, 2006
Olli Seppänen1, William J Fisk2, QH Lei2
1Helsinki University of Technology POBox 4100, FIN-02015 HUT, Finland 2Indoor Environment Department Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA
Analyzed a wide set of literature and determined almost all studies found increases in performance with higher ventilation rates.
11d(11Jt Air 1999; 9: 165—179.
PAWEL WARGOCKI, DAVID P. WYON, YONG K. BAIK, GEO CLAUSEN AND P. OLE FANGER
The subject-rated acceptability of the perceived air quality in the office corresponded to 22% dissatisfied when the pollution source (an old rug) was present, and to 15% dissatisfied when the pollution source was absent. In the former condition there was a significantly increased prevalence of headaches (P=0.04) and significantly lower levels of reported effort (P=0.02) during the text typing and calculation tasks, both of which required a sustained level of concentration. In the text typing task, subjects worked significantly more slowly when the pollution source was present in the office (P=0.003), typing 6.5% less text than when the pollution source was absent from the office. Reducing the pollution load on indoor air proved to be an effective means of improving the comfort, health and productivity of building occupants.
Published as Chapter 4 in Indoor Air Quality Handbook, eds: J. D. Spengler, J.M. Samet, and J.F McCarthy, McGraw Hill
William J. Fisk, Indoor Environment Department, Lawrence Berkeley National Laboratory
Based on a review of existing literature, there is strong evidence that characteristics of buildings and indoor environments significantly influence the occurrence of respiratory disease, allergy and asthma symptoms, sick building symptoms, and worker performance.
Estimates of the potential impact of improving indoor air quality are provided in Table 5.
|Source of Productivity Gain||Potential Annual Health Benefits||Potential U.S. Annual Savings or Productivity Gain (1996 $U.S.)|
|Reduced respiratory disease||16 to 37 million avoided cases of common cold or influenza||$6 - $14 billion|
|Reduced allergies and asthma||10% to 30% decrease in symptoms within 53 million allergy sufferers and 16 million asthmatics||$2 - $4 billion|
|Reduced sick building syndrome symptoms||20% to 50% reduction in SBS health symptoms experienced frequently at work by approximately 15 million workers||$15 - $38 billion|
|Improved worker performance from changes in thermal||Not applicable||$20 - $200 billion|