Abstract
Microclimatic observations about the thermal environment of classroom with outer vertical green screen were performed during 20 days in summer. Green screen have a large effect of improving the radiation environment, although it leads also negative effect for thermal comfort to reduce the cross ventilation rate. As for the illumination in the classroom, it was decreased to one-third of that without screen condition. However, it does not result in the increase of extra electric energy for the lighting, because artificial lighting equipments were always used even a well-lighted condition by the sky light.
