Best building management system software
Milvian AI teamFacilities and infrastructure intelligence
Good BMS software reads the controllers you have over open protocols, keeps long histories you own, diagnoses faults with evidence and logs every command. Lock-in is the risk to test hardest.
What BMS software is for
A building management system controls heating, cooling, ventilation and often lighting through controllers in the plant room and on each floor. The software is the front end: schedules, setpoints, alarms and trends. Most buildings already have one, and the buying question is usually what to add, what to replace and how to avoid being tied to one contractor for twenty years.
The stakes are real. DOE's Smart Energy Analytics Campaign found median savings of 9 percent from fault detection and diagnostics, and LBNL found that on any given day 40 percent of air handlers showed a reported fault across 60,000 pieces of equipment. The software decides whether those faults are found.
What to require
| Requirement | Why it matters here | Ask the vendor |
|---|---|---|
| Open protocols. | BACnet and Modbus let you change contractors. | Which parts of the system need your proprietary tools? |
| Data you own. | Trends are the record of how the building ran. | Can we export every trend, in full, at any time? |
| Fault diagnosis. | Alarms without causes waste technician hours. | Show a diagnosed fault with the evidence behind it. |
| Command governance. | Changes need an owner, a reason and a record. | Is there a per-device command history? |
| Multi-site view. | Portfolios outgrow one front end per building. | Can one login see every site? |
Lock-in, and how to test for it
Ask who holds the programming tools and licenses, whether the controllers accept programming from other integrators, and what happens to the trend history if the service contract ends. Ask for the points list in a standard format. A vendor who cannot answer these on paper will be expensive to leave.
Looking ahead, building performance standards such as New York's Local Law 97 and the recast EU EPBD make measured performance a legal matter, so the BMS has to produce data an auditor can follow.
How to evaluate it
- Inventory controllersList brand, protocol, firmware and support status per building.
- Request the points listCheck naming, units and export format.
- Test a faultAsk each vendor to diagnose a known problem from your data.
- Price the exitGet the cost of moving service to another integrator in writing.
Where Aqueduct fits
Aqueduct can work three ways: read the BMS you keep and add diagnosis, baselines and a portfolio view; replace an unsupported front end with Smart Controls over BACnet and Modbus; or be specified into new construction. In every case trend data stays in aQ Core, and control runs where control is enabled, with owner approval, with lockouts and a command history.
Sources
| Source | Link |
|---|---|
| US DOE, Smart Energy Analytics Campaign | energy.gov |
| LBNL, Crowe and Granderson et al., 2023 | bies.lbl.gov |
| NYC Department of Buildings, Local Law 97 | nyc.gov |
| European Commission, Energy Performance of Buildings Directive | energy.ec.europa.eu |
