How does occupant behavior influence a building's energy performance?

• A. The design alone determines energy use with minimal occupant influence
• B. Use of energy-intensive equipment, thermostat settings, window opening, and maintenance affect actual energy use beyond design predictions
• C. Weather is the only determinant of energy consumption
• D. Architectural aesthetics determine energy use

Answer: (B)

Energy performance isn’t fixed by the building’s design alone; how people use and care for the space has a big impact. The actual energy use reflects actions like what equipment is run and for how long, the thermostat settings that control heating and cooling, whether windows are opened or left closed, and how well the systems are maintained. For example, leaving lights on in unoccupied rooms, running computers and devices continuously, setting the thermostat too low or too high, or opening windows while the HVAC is on can all change energy consumption from what the design would predict. Regular maintenance keeps equipment performing as intended, preventing efficiency losses from dirty filters or faulty components. Occupancy patterns and how daylight is used or shaded also affect loads. Weather matters, but it combines with these behaviors rather than being the sole driver, and aesthetics don’t determine energy use.