Schools in Scandinavia are buildings where there is a need of cooling only for a short period of time. Due to the large number of students the ventilation system often cannot provide the necessary cooling without causing draught. We introduce additional cooling by an internal high velocity system that cool people. This system creates a downward air stream of five minutes duration that blows the rising thermal plume above a person away, thus exposing the student to an enhanced convective cooling. As the heat load was high the occupants were at the same time exposed to a rising room temperature. Assessments have been made where groups of subjects were exposed to velocity variations respectively constant low velocity. The mean thermal votes and air quality were measured during 80 minutes. The results are analysed as differences between the two groups in change over time.