Running the building empty
Most buildings heat, cool and ventilate space nobody's in.
Picture an airline flying a 777 back and forth across the Atlantic with no passengers — engines running, fuel burning, for nothing. No airline would last a week.
Most buildings run exactly like that. Property is one of the largest costs an organisation carries, yet the lighting, heating and ventilation run at full tilt in empty rooms, dormant wings and floors nobody is on.
The number that matters is yield: how many people actually use the building, against what it costs to run. A building drawing the same load whether it's full or empty isn't being managed — it's being subsidised.
The BMS doesn't save you.
Challenge the waste and someone points at the ceiling: "it's fine, we have a building management system." Most buildings have no telemetry at all. The ones that do are often no smarter — overrides pile up, schedules get patched to silence a complaint, and the system ends up running fans and boilers around the clock, blind to whether anyone is in.
Smart isn't a box you install. It's what you do with what the building tells you.
Everything is connected.
Building problems aren't separate modules. Damp is an energy problem — too little heat drops a surface below dew point and condensation forms. Overheating is the same fault inverted — warmth pumped into empty rooms by a timeclock that doesn't know they emptied hours ago. Net zero is as much about when you draw power as how much.
Take ventilation. A CO₂ sensor tells the intake fans to pull in fresh air. Sensible — until it's 8:30 on a main road and the system pulls rush-hour NO₂ and PM2.5 straight into a classroom full of children.
Context decides.
Read occupancy, outside air quality and grid price together and the building can act on all three at once. Bring fresh air in when it's clean and power is cheap; pre-heat or pre-cool in those windows; switch to recirculation when the air outside is worse than the air in, holding until occupancy genuinely demands a change.
The point.
You don't fix the empty plane by staring at a dashboard. You fix it by giving the building enough context to run for the people who are actually in it.