CO2 DCV monitors CO2 levels using a wall-mounted CO2 sensor. This ensures high indoor air quality (IAQ) for the zone. The sensor measures CO2 levels on a scale of 0 to 2,000 parts per million (ppm). When the CO2 sensor detects that CO2 levels in the zone are above the setpoint, such as when a high number of occupants are within the zone, the Zone Damper opens to allow more outside air into the zone. You can enable CO2 DCV in the Zone Setup screen of the System Manager or Zone Coordinator. Refer to the Verasys System User’s Guide (LIT-12012370) for more information.