
An airport needs one view across terminals, the central utility plant, airside utilities and tenants. Each terminal can keep its own controls if the platform above reads them all and ties them to flight schedules.
Why airports outgrow a single BMS
An airport is a city that never closes, built over decades. Terminals from different eras run different controls brands, the central utility plant has its own system, and airside lighting, baggage handling and jet bridges sit with yet more contractors. Tenants such as retailers, restaurants and airlines meter, or fail to meter, their own spaces.
Occupancy swings with the flight schedule rather than the clock. A gate area needs full air in the hour before a departure and very little at 3 a.m., yet many terminals still run fixed schedules.
EIA counts transportation terminals within its public assembly category, which averaged 81.1 thousand Btu per square foot in 2018, with space heating at 48 percent of end use.
What the system has to do
| Requirement | Why it matters here | Ask the vendor |
|---|---|---|
| Read every terminal's controls. | Replacing all of them at once is rarely funded. | Which of our controllers can you read over BACnet or Modbus today? |
| Follow the flight schedule. | Gate and concourse ventilation should track passengers. | Can occupancy or schedules drive HVAC by zone? |
| Meter the central plant. | Chillers, boilers and cooling towers serve every terminal. | Can you baseline each plant system against weather? |
| Bill tenants from meters. | Recovery depends on real consumption, not square footage. | Do you handle shared meters and tenant views? |
| Deploy fast and securely. | Airside work windows are short and IT review is strict. | How long did your last airport deployment take? |
Reporting and what is changing
Airport Carbon Accreditation has seven levels, and Level 5 requires a net zero balance on scope 1 and 2 emissions, so an airport chasing a higher level needs metered energy by terminal and plant. ENERGY STAR Portfolio Manager and ISO 50001 cover the energy side, and ESRS E3 asks European airports for water consumption, withdrawal and discharge.
Electrification is the trend to plan for. Global electricity demand rose 4.3 percent in 2024 according to the IEA, and airports electrifying ground equipment and heating will feel that in peak charges.
Running the evaluation
- Inventory systems by terminalList controls, meters and contractors for every terminal and the plant.
- Start with one terminal and the plantThat shows schedule waste and plant efficiency together.
- Connect the flight scheduleTest whether gate areas follow departures.
- Add tenants lastOnce the meters are trusted, move recovery onto them.
Where Aqueduct fits
Aqueduct reads terminal controllers and plant meters into aQ Core, which models every terminal, floor and zone. aQ EnergySmart baselines the plant and terminals against weather, aQ WaterGuard closes the airport water balance, aQ AirSafe ventilates gates to measured occupancy, and Billing Management bills tenants from shared and dedicated meters. Smart Controls acts on schedules and air handlers where control is enabled, with owner approval. A top 25 US airport went live in two weeks with 5,000 meter points.
Sources
| Source | Link |
|---|---|
| US EIA, CBECS 2018, Public assembly buildings | eia.gov |
| Airport Carbon Accreditation | airportcarbonaccreditation.org |
| IEA, Electricity 2025 | iea.org |


