Unoccupied Mode is a reduced-operation setting where HVAC systems operate at minimal capacity to maintain basic building conditions while occupants are absent. This mode significantly reduces energy consumption by raising cooling setpoints or lowering heating setpoints during known periods without occupants present.
Operating Characteristics
In Unoccupied Mode, heating setpoints typically reduce to 60-65°F and cooling setpoints increase to 78-82°F. Outdoor air ventilation minimizes to 0.06 cubic feet per minute per square foot or equipment minimum requirements, reducing fan energy by 50-70%. Lighting controls integrate to disable unnecessary illumination. Systems may cycle equipment on and off rather than continuous operation, further reducing runtime and energy demand.
Application and Scheduling
Unoccupied Mode activates during nights, weekends, and scheduled closures. Programmable thermostats and occupancy sensors automatically transition between modes. This strategy saves 15-25% of heating and cooling energy in commercial buildings with regular unoccupied periods. Proper setpoint selection prevents humidity problems, condensation, or equipment damage while eliminating comfort-driven energy waste during empty spaces.