Occupancy Sensors

Occupancy sensors can be an inexpensive demand-controlled ventilation (DCV) option for spaces with a fixed number of occupants for limited hours per day, such as warehouses and other storage spaces.

Occupancy sensors typically use infrared technology to detect when people are present. When sensors detect occupants, they trigger ventilation fans to turn on at maximum design levels. When sensors do not detect occupants, they shut off outside air delivery or reduce ventilation to minimum design levels.

Buildings with long and variable occupancy will achieve less energy savings as sensors typically cannot detect levels of occupancy. Over-ventilation may still occur during slow periods, as the system provides enough ventilation for a fully occupied room, even if only one occupant is present.

Time-controlled ventilation and carbon dioxide (CO₂) sensors are other DCV options you can apply in your building.