Demand control ventilation systems : performances of CO2 detection

In France, in non residential buildings, these systems are generally controlled by either a CO2 sensor or optical movement detection (infrared).The part of the study we present here was to determine :- laboratory tests methods to assess the performances of CO2 sensors for ventilation application.- the working performances of these sensors, and particularly the long term stability in a meeting room.- a methodology to assess the performances of CO2 DCV system in French technical agreementThe main results of this study are :- it is easy to characterize (to calibrate) the sensors- the long term stability is good enough,- the slight concentration gradient makes the choice of sensor location easier.A methodology to assess the performances of CO2 controlled ventilation system (both for IAQ and energy) has been developed within the framework of a technical agreement