In a university building in Boston, IAQ complaints prompted an increase in outdoor air ventilation, causing a large increase in energy use. C02 readings were then taken in an auditorium, cafeteria, offices, and classrooms. The readings were used to calculate occupancy estimates and to simulate operation of a demand-controlled ventilation (DCV) system. The differential equations were solved in a spreadsheet program using a Runge-Kutta macro. A PID control system was also simulated. Ventilation adjustments were input to DOE-2 to estimate energy savings. A two year payback was estimated. DCV was also shown to provide a small savings when compared to lower design ventilation rates, while improving IAQ.
The use of CO2 readings with fixed ventilation to predict energy savings with demand-controlled ventilation.
![](https://www.aivc.org/sites/default/files/default_images/default_image_5.png)
Year:
1997
Bibliographic info:
USA, Washington DC, Healthy Buildings/IAQ '97, 1997, proceedings of a conference held Bethesda MD, USA, September 27 - October 2, 1997, Volume 1, pp 93-98