Ventilation devices especially air conditioners, play important role in filtering and circulating quality air and providing conducive environment inside dwellings, offices and other cabins as in cars, ships, aero planes This study discovered that air conditioners ranked highest above other ventilation devices, in harboring various kinds of microbes, which they may introduce and circulate periodically in indoor micro environment in some apartments, affecting the occupants health wise. Such appliances are therefore not 100% efficient in their present state as means of achieving future air quality.
