GREEN WALLS CAN IMPROVE INDOOR AIR QUALITY IN THE CLASSROOM

Abstract

Buildings are places where people live and perform daily activities. Good indoor air quality is essential for them to live healthily inside. In order to provide satisfactory indoor air quality, a green wall should be installed to reduce indoor carbon dioxide (CO2). Several research studies have been conducted examining the effects of indoor CO2 levels. However, this research emphasizes studying the impact of light sensitivity on the ability of plants to reduce CO2. Four types of ornamental plants constituted our sample, Nephrolepis exaltata, Chlorophytum comosum, Epipremnum aureum (Marble Queen), and Epipremnum aureum (Spotted Betel). The plants were placed in an experimental box to allow us to investigate their ability to reduce CO2 over a 24-hour period. The most effective plant was then tested on a green wall in a classroom enabling the study of CO2 reduction in three different locations with varying light levels. It was found that green walls with Marble Queen placed perpendicular to windows allowing optimum light exposure were able to reduce CO2 at the most favorable rate of 1.74 ppm/min.