Occupancy determination techniques

A building, comprising:

• a plurality of defined spaces;
• at least some of the defined spaces including:
• a respective infrared (IR) detector configured to collect IR imaging data, each IR detector having a respective field of view;
• and
• a respective controller comprising circuitry configured to process the collected IR imaging data and determine occupancy data for a respective defined space;
• wherein
• the determined occupancy data excludes personally identifiable information (PII) of any occupant in the space.

A method comprising:

• collecting infrared (IR) imaging data from an IR detector, the IR detector having a field of view;
• processing, with a controller comprising circuitry, the collected IR imaging data;
• and
• determining, with the controller, occupancy data fix a space, within a building, within the field of view of the IR detector;
• wherein
• the determined occupancy data excludes personally identifiable information (PII) of any occupant in the space.