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Ventilation and performance in office work.

O Seppänen1, W J Fisk, Q H Lei

  • 1Department of Mechanical Engineering, Helsinki University of Technology, Helsinki, Finland. ollie.seppanen@hut.fi

Indoor Air
|January 20, 2006
PubMed
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Increasing outdoor air ventilation rates can boost work performance. Studies show a 1-3% average performance increase per 10 liters per second per person, with significant gains up to 15 l/s-person.

Area of Science:

  • Environmental Health
  • Occupational Health
  • Building Science

Background:

  • Outdoor air ventilation rates in buildings vary significantly and are often insufficient.
  • Low ventilation rates may negatively impact occupant work performance.

Purpose of the Study:

  • To evaluate the potential work performance benefits associated with increased outdoor air ventilation rates.
  • To establish a quantitative relationship between ventilation rates and work productivity.

Main Methods:

  • Systematic literature review and meta-analysis of studies on ventilation rates and work performance.
  • Statistical analysis with weighting factors to combine results from laboratory and real-world building studies.
  • Development of a model to describe the relationship between ventilation and performance.

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Main Results:

  • Nearly all reviewed studies reported performance increases with higher ventilation rates.
  • A typical improvement of 1-3% in average performance was observed per 10 l/s-person increase in outdoor air ventilation.
  • Performance gains were more pronounced at rates below 20 l/s-person and became negligible above 45 l/s-person.
  • Statistically significant performance increases were noted up to 15 l/s-person (95% CI) and 17 l/s-person (90% CI).

Conclusions:

  • A quantitative, albeit uncertain, relationship exists between work performance and ventilation rates (6.5–65 l/s-person).
  • Increased ventilation, particularly up to 15 l/s-person, offers statistically significant performance benefits.
  • Integrating ventilation-productivity relationships into design is recommended over current practices that ignore this link.