occupants

The Performance 2 project (2020-2024) is a French national research project that aims to evaluate the robustness of Humidity-based DCV systems installed in two multi-family dwellings more than 10 years ago. This evaluation include analyses of results of measurements performed on the ventilation system and IAQ campaigns in 13 dwellings. As the emissions of indoor pollutants strongly depend on the occupant’s behavior, information is required regarding the activities and habits of the occupants during the IAQ campaigns. The occupants often judge this information very intrusive and too big.

This paper characterizes the relationship between occupant activities and indoor air particulate levels in a non-smoking office building. Occupant activities were recorded on video. Particulate concentrations were monitored by three optical particle counters (OPCs) in five size ranges at three heights. Particulate mass concentrations were measured gravimetrically and bioaerosol concentrations were determined by impaction methods. Occupant activities and number concentrations were determined with 1-min resolution over a 1-week period.

Discusses the public's knowledge of indoor air quality and their sources of information, including word of mouth and the media.

Discusses the requirements of air supply installations in high-occupancy spaces. Describes the characteristics of different systems of air diffusion, illustrates them and their operation in diagrams and photographs and demonstrates the nature of the room air flows created by them. Lists and discusses the advantages and drawbacks of air introduction from chairs and desks, from pivoting nozzles in walls of galleries and from ceiling or floor diffusers.