Indian Journal of Science and Technology

Abstract

Nowadays, people spend most of their times in buildings, which makes us aware of indoor air quality and our health. This research was conducted by installing four air ventilation systems in a class room with air conditioning systems in order to study air quality. The study is to determine the most suitable system in terms of air quality and operating cost. Air quality in a classroom depends on six factors which are ventilation rate, carbon dioxide level, dust concentration, air speed, temperature, and humidity. The recommended ventilation system creates better air quality while uses minimal energy from air conditioning and ventilation system. The recommended system composed of a fresh air intake by fans pass through three layers of filters without installing any exhaust fan in a room. The system can reduce carbon dioxide levels, which is a primary factor, from 1000 ppm to 760 ppm within 40 minutes and can control other air quality factors within generally accepted indoor air standards.
Keywords: Air Quality, Carbon Dioxide, Classroom , Ventilation System