Columbia Property Trust implemented a demand control ventilation system at one of its office buildings in Atlanta to improve HVAC efficiency and reduce costs. McKenney's Automation & Control Solutions team recommended installing CO2 monitors and a DCV system to automatically adjust outside air ventilation based on occupancy levels. This lowered the HVAC load by an estimated 70 tons and energy usage by 65,000 kWh per month while maintaining comfort. The project achieved a return on investment of less than four months.