VENTILATION SOLUTIONS FOR CLASSROOMS

In this paper air distribution solutions aiming to lower air velocities and good temperature control arestudied by measurements in 6 schools and temperature simulations. Air velocity measurementsshowed good performance of duct and ceiling diffusers which provided maximum velocities less than0.2 m/s and can be highly recommended for classrooms. The wall diffusers were clearly not suitable forclassrooms due to high velocities up to 0.43 m/s. Displacement ventilation diffusers were very sensitiveto supply air temperature, as with the temperature difference of 3 C velocities up to 0.28 m/s weremeasured. Room temperature measurement results showed a typical problem with temperature controlas at the end of the heating season the temperatures up to 25 C were measured. The parametricsimulations showed that high supply air flow rates up to 10 L/s per person and cool supply air down to1415 C were needed for room temperature control.