What is Demand Control Ventilation (DCV) and how does it work with the thermostat?

Demand Control Ventilation uses CO2 sensors to measure occupancy levels and automatically adjust ventilation rates accordingly. The CO2 sensor is wired to the Jade W7220 economizer, which modulates the outdoor air damper to maintain the space below a set CO2 ppm level (default 1100 ppm). This allows buildings to reduce ventilation during partial occupancy periods, saving significant energy while meeting ASHRAE 62.1 code requirements.