Outlines of contaminant controlled ventilation systems

Experience shows that there are differences between the design and the real load of ventilation systems. Consequently, the fresh air demand usually varies over a wide range during operation. In normal usage, different types of gaseous contaminants enter the air, that might be hazardous to health. The constant inhalation of contaminated indoor air might lead discomfort or to harmful physiological effects.
The difference between the design and the real load can be diminished by augmenting the ventilation system with appropriate components and controls. The proposed control system tracks the actual load and supplies the necessary supplemental fresh air without disturbing the air supply to other spaces. The benefit of this system is that the required air quantity is supplied to follow the load but no energy is wasted for the heating and cooling of spaces where the system load is below the design load.