Principles and benefits of contaminant controlled ventilation systems.

A good air quality control system ensures that the most common harmful gaseous contaminants are kept below permissible levels particularly in forced ventilated spaces. Such a system can ensure a high standard of indoor air and a healthy environment. The volume of fresh air in a room can be adjusted according to the number of occupants and their level of activity. It is important to keep a vigilant eye on the levels of the most common harmful gases, because most of them cannot be detected by human senses. Every room has a sensor at a given height which, when harmful gases are detected, is used to increase the supply of fresh air until the amount of the gas falls below the permitted level. The control system gives off an alarm when the concentration of a monitored gas constantly exceeds the maximum permitted. The system is designed to ensure that the maximal velocity of the air duct cannot be exceeded during operation. The control system ensures the appropriate indoor air quality of the rooms, while not disturbing the supply of air for other spaces, provided from the same ventilating system. Moreover none of the parts of the ventilating system is working unnecessarily. Energy savings can even be achieved by operating this air quality control system.