BACS Class B and A
Intelligent, modulated, and optimized system management in accordance with UNI EN ISO 52120‑1
BRAINWATT® ransforms building systems into an integrated and automated platform, natively enabling the features required to achieve BACS Classes B and A as defined by UNI EN ISO 52120‑1
BACS classes defined by the standard
Class A
Advanced automation, modulation, predictivity, and optimization
Class B
Advanced automation and modulation
Class C
Basic automation
(on/off)
Class D
No automation
BRAINWATT®
Ready-to-use BACS Class B and A
BRAINWATT®natively integrates both the features required for Class B and the advanced capabilities that enable the transition to Class A.
Class B
Advanced automation and modulation
Advanced modulation of lighting and HVAC
Intelligent management based on schedules, occupancy, and space usage
Integration of different systems into a unified control logic
Continuous monitoring of energy parameters
How to enable Class B with BRAINWATT® ?
Activate the modules
Monitoring
Anomaly Detection
Energy Audit
Remote Control
Class A
Advanced automation, modulation, predictivity, and optimization
Predictive algorithms for climate, lighting, and space utilization
Proactive consumption optimizatio
Dynamic strategies based on weather, expected occupancy, and historical data
Automatic coordination of all technical building systems
How to enable Class A with BRAINWATT® ?
Activate the modules
Monitoring
Anomaly Detection
Energy Audit
Optimization
The result: more efficient, controllable, high-performing buildings,
fully compliant with the requirements of the standard.
Value for the Tertiary and Real Estate sector
- Optimization of consumption in complex facilities
- Increased comfort for users and staff
- Compliance with EPBD4 regulation
- Improved SRI (Smart Readiness Indicator) score
- Access to incentives and subsidies (Conto Termico 3.0)
Value for Public Administration
- Improved energy governance of public building portfolios
- Operational continuity through reliable and scalable systems
- Full support during design and system configuration phases
- Access to incentives and subsidies (Conto Termico 3.0)
Bring your building to Class B or Class A with BRAINWATT®
Want to know which class your building can achieve and which functions are required?
We will show you how to achieve intelligent, modulated, and optimized system management
in accordance with UNI EN ISO 52120‑1.
Types of systems within the BACS scope
according to UNI EN ISO 52120‑1
BRAINWATT® controls and coordinates all technical building systems that affect consumption, comfort, and energy performance in an integrated manner, enabling BACS compliance for Classes B and A as defined by UNI EN ISO 52120‑1
Managed systems include:
HVAC
Heating, cooling, mechanical ventilation, thermal and cooling plants, heat pumps
Lighting
Continuous modulation, dimming, daylight management
Electrical systems
Load monitoring, panels, sub-panels, UPS, power factor correction
Energy generation
Photovoltaic, cogeneration, storage
Indoor environmental quality
Temperature, humidity, CO₂, motorized solar shading
Hydronic and control components
AHUs, fan coils, pumps, valves, and motorized dampers
Frequently asked questions on BACS systems and UNI EN ISO 52120‑1
What are the requirements for Classes A and B of the UNI EN ISO 52120-1 standard?
The UNI EN ISO 52120-1 standard defines the efficiency levels of building automation systems. Class B requires advanced modulation of HVAC and lighting systems, while Class A represents high efficiency achieved through predictive optimization.
BRAINWATT® natively enables these classes by transforming technical assets into an intelligent system. Through the Optimization module, it introduces dynamic strategies based on weather data and occupancy to enable proactive consumption management.
Which technical functionalities define a BACS system in Class A?
To ensure compliance with Class A, a system must integrate load automation with forecasting algorithms. Criteria include continuous monitoring, automated orchestration of HVAC systems, and coordination with renewable energy generation.
The BRAINWATT® platform meets these requirements by integrating Monitoring, Anomaly Detection, and Optimization modules – technological components that are also essential to improve the building’s SRI (Smart Readiness Indicator).
How do BACS systems support Conto Termico 3.0 and the EPBD4 Directive?
The adoption of BACS technologies is incentivized by Conto Termico 3.0 to improve efficiency in the tertiary and public sectors and is also a key pillar of the EPBD4 Directive (Green Buildings) aimed at reducing carbon footprint.
The use of BRAINWATT® simplifies access to these incentives, as it enables existing systems to be classified under Class A or B efficiency levels. This ensures compliance with European requirements and guarantees operational continuity of building assets through modulated control.
Which technical systems fall within the control scope of a BACS system?
A UNI EN ISO 52120-1 compliant BACS system acts as a centralized supervisor for all systems that influence energy performance. The scope includes thermal plants (heat pumps, AHUs), dimmable lighting systems, generation assets (photovoltaic, storage), and indoor environmental quality sensors (CO₂, humidity).
BRAINWATT® provides native integration of these vectors, ensuring that the entire building operates as a single optimized unit, maximizing occupant comfort and energy savings.
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