Our prior research found that CO₂ sensors deployed for demand controlled ventilation (DCV) applications in California often had large errors, making DCV unreliable. The goal of this task is to evaluate the accuracy of current-generation CO₂ sensors marketed for DCV use.

• Select different types of CO₂ and assemble a test system consists of an array of sensors, a reference CO₂ instrument, and temperature/relative humidity sensor.

• Deploy the test systems for up to two years in three buildings: general office space, office conference room, and classroom. 

• Report CO₂ sensor accuracy and implications of test results.