What is a connected smart building?
A typical building is made up of a number of independent systems: the building management system (BMS) controls the HVAC, the fire alarm system manages fire alarms, the access control system manages doors, and meters measure energy consumption—but these systems do not communicate with one another and are only visible through siloed local interfaces.
The connected smart building unifies these silos through an IoT layer: sensors and gateways collect data from all systems, and a cloud platform centralizes monitoring, analysis, and control.
The benefits are measurable:
- Energy — 15–30% reduction in energy consumption through automatic optimization.
- Comfort — real-time adjustment based on occupancy and weather conditions.
- Maintenance — preventive fault detection, remote maintenance.
- Reporting — regulatory dashboards, carbon footprint assessment, OPERAT (tertiary sector decree).
- Security — centralized monitoring of access, cameras, and alarms.
Architecture of a Connected Smart Building
Smart Building Use Cases
Energy Optimization
The platform analyzes energy consumption patterns by zone, by use, and by hour. It identifies sources of waste (equipment left on when unoccupied, thermal bridges, water leaks) and suggests corrective actions. Automatic optimization—such as turning off lights when no one is present and adjusting heating based on weather forecasts—reduces energy costs without human intervention.
Comfort and Air Quality
CO₂, temperature, and humidity sensors in each zone allow ventilation to be adjusted based on actual occupancy—not according to a fixed schedule. In meeting rooms, ventilation turns on when occupants arrive and reduces when the room empties.
Predictive Maintenance
Analyzing the energy consumption curves of a chiller or boiler reveals gradual deterioration before a breakdown occurs: a heat pump that consumes 15% more energy than it did 6 months ago to reach the same temperature is beginning to deteriorate. Planned maintenance costs one-third as much as an emergency repair.
Regulatory Compliance
The Tertiary Sector Decree (BACS) requires a gradual reduction in energy consumption in commercial buildings. The platform automatically generates the consumption reports to be submitted to OPERAT, including historical data, certifications, and comparisons to benchmark values.
Protocols and Integrations
| System | Standard Protocol | Integration Method |
|---|---|---|
| BMS Supervisor (Sauter, Siemens, Trend) | BACnet/IP | BACnet client via gateway |
| HVAC Controllers | Modbus RTU/TCP | Modbus polling |
| Energy Meters | Modbus RTU | RS-485 via gateway |
| Water and Gas Meters | M-Bus | M-Bus concentrator |
| DALI Lighting | DALI/KNX | Via DALI/IP gateway |
| Access Control | REST/IP API | Webhook or pull API |
| CO₂ / Temperature / Humidity Sensors | LoRaWAN / NB-IoT | Via LoRaWAN gateway |
The Eziwan Approach
The Eziwan Gateway and the Eziwan Cloud form the backbone of a connected smart building: multi-protocol data collection (BACnet, Modbus, M-Bus, LoRaWAN), cloud data transmission via 4G or Ethernet, energy and comfort dashboard, alerts, and remote access.
Learn more: 4G-Connected Building Management System, Industrial Energy Monitoring, and Remote Site Monitoring.