The GE Telaire Ventostat 8000 Series of CO2 detectors are commercial grade units designed for Demand Controlled Ventilation (DCV) in buildings. This approach, which uses carbon dioxide levels as an indicator of occupancy, allows ventilation based upon actual occupancy while still maintaining ASHRAE recommended per-person ventilation rates. By using any carbon dioxide detector from the Ventostat 8000 series, over-ventilation of buildings can be reduced - saving energy costs while still maintaining the highest standards of air quality. The Ventostat 8000 Series of CO2 detectors is available in two configurations: wall mounted sensors or duct mounted sensors. Wall mounted units act much like a standard thermostat.