Global data includes data such as outside air temperature and electrical demand. Which statement best describes this data?

• A. Outside air temperature and electrical demand.
• B. Local room temperature.
• C. Firmware version numbers.
• D. User authentication data.

Answer: (A)

Global data encompasses measurements that affect the entire system or building. Outside air temperature and electrical demand are classic examples because they reflect conditions that influence HVAC strategy and overall power use across all zones. In contrast, local room temperature is specific to one space, firmware version numbers are software identifiers, and user authentication data relates to security. So the pair of outside air temperature and electrical demand best describes global data.