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30 human subjects were exposed to simulated office conditions to study perceived air quality and sick building symptoms. The sensory pollution load of personal computers was found to be 3 olf each.

This paper describes the hybrid ventilation system of a new office building (650 employees) in Amsterdam (The Netherlands) equipped with a decentralized building automation and individual controls.

In a building with two parts, one with bad indoor air quality, workers have been moved around from one to another and absenteeism rate and causes have been monitored.

Difficulties of CFD calculations to predict comfort especially in case of high level of turbulences are enquired in this study. Statistical corrections when the direction of the velocity vector changes are proposed to improve CFD models.

The study presents a zonal model to evaluate the global comfort of air conditioned buildings. The model calculates various criterions such as Ppo and DR. Sound measure level is estimated with Sabine law. Comparisons with tests are presented.

Techniques to reduce noise ingress into naturally ventilated buildings are described.

This study presents a comparison of perceived indoor conditions in both air-conditioned and naturally ventilated buildings.

Three portable air cleaners alone or combined with ultra-violet germicidal irradiations were tested to determine their capacity to remove airborne bacteria. Results give values of airborne bacteria removal rates.

A design procedure of material and hybrid ventilation systems is described. It includes a climate suitability analysis, a loop equation design method and a detailed multizone coupled thermal-airflow analysis using CONTAM97R software.

Perceived air quality and sensory pollution loads were measured in 6 office buildings in Denmark with a panel of 43 subjets on a normal weekday and on a weekend. Results are presented and discussed.