Personalized ventilation: impact of airflow direction at the breathing zone on inhaled air quality

Personalized ventilation aims for supplying clean air to the breathing zone of each occupant.The impact of the direction of the personalized flow on the inhaled air quality was studied.Experiments were performed in a full scale room. Personalized ventilation in conjunction with mixing ventilation was used. Breathing thermal manikin resembled person seated at a desk. Tracer gas, mixed with room air was used to simulate pollution. No significant difference in inhaled air quality was identified when the flow was supplied from front, left, right and above at distance between the personalized air supply device and the face of the manikin, 0.3, 0.4 and 0.5 m. This result was obtained at different levels of dilution of the personalized air with the polluted room air