Air quality and thermal comfort in a room with underfloor displacement and mixing ventilation

For that study, an underfloor ventilation system providing two different airflow patterns (short and long throw) was tested and compared with a mixing and displacement ventilation system in a mock-up of a typical office. The systems were operated under identical conditions.
The authors conclude that an underfloor ventilation system providing a short throw can ensure both a high air quality (comparable to displacement ventilation), while providing a low risk of thermal discomfort for occupants.