SRI class
Class 0–20 %: not smart-ready
In short
- 1This class represents a score of 0 to 20 percent on the Smart Readiness Indicator.
- 2On this platform we call this "not smart-ready", shown as letter G in comparable tools.
- 3Buildings in this class have virtually no automation and no building management system.
Position in the class table
| Band | Name | Meaning | Letter in tools |
|---|---|---|---|
| 90–100 % | Fully smart-ready | Almost all installations are smartly controlled, integrated and ready to move with the grid. | A |
| 80–90 % | Very smart | A building with a mature building management system, demand-driven installations and first forms of energy flexibility. | B |
| 65–80 % | Smart | The main installations are controlled per zone and on occupancy. | C |
| 50–65 % | On the way | There is a building management system and some installations are smartly controlled, but not consistently and not integrated. | D |
| 35–50 % | Basics in place | Central controls and time schedules, little occupancy control, limited reporting. | E |
| 20–35 % | Limited | Manual operation dominates. | F |
| 0–20 % | Not smart-ready | Almost everything is operated by hand. | G |
What does this class mean?
A building in class G scores between 0 and 20 percent on the Smart Readiness Indicator (SRI). The SRI is a method from European regulation that measures how well a building can interact with its occupant, the electricity grid, and its own systems. A score in this class means the building has very limited ability to do so.
The name "not smart-ready" is a designation used on this platform and is not an official term from the regulation. In some tools this class is marked with the letter G, similar to the lowest category on an energy label.
What is missing in these buildings?
The defining feature of this class is that almost everything is operated manually. Heating, cooling, lighting, and ventilation work independently of each other, without central control.
No building management system (BMS) is present. This is the system that controls and monitors installations in a building. Without such a system, there is also no visibility into energy consumption, which makes improvement difficult.
Why is this relevant for owners?
The Smart Readiness Indicator is currently voluntary. Under the EPBD (Energy Performance of Buildings Directive), the European Commission must adopt a delegated act by 30 June 2027 that is expected to make the SRI mandatory for utility buildings with HVAC power above 290 kW.
Buildings in this class face a risk in this context. Standalone installations above 290 kW have in fact been subject to building automation rules since late 2024, regardless of the SRI score.
How does this class compare across other countries?
Test phases in various member states show that low scores are not uncommon. In Denmark, all 27 buildings studied fell into one of the three lowest bands.
In the Czech Republic, the average across 162 buildings was 20.6 percent, just above the threshold of this class. This shows that improvement is often possible in small steps.
One class higher
20–35 % · Limited: Manual operation dominates. There are thermostats and perhaps a timer, but no coherence. The Czech test-phase average was around this boundary.
What this means for you
- Owner
- If your building falls into this class, it lacks both a building management system and central control of installations, which is the foundation for any form of energy saving. Start by measuring consumption and consider a simple building management system, especially if your HVAC power is above 290 kW and future obligations may become relevant.
- Tenant
- In a building from this class, you likely operate all switches and thermostats yourself, with no automatic adjustment to your usage. You will notice this in less consistent indoor climate conditions and possibly higher energy costs due to the lack of system control.
- Advisor
- In your assessment, focus on the absence of a building management system as the core cause of the low score, and check whether HVAC power exceeds 290 kW in relation to existing obligations. Use the scores from test phases in other member states, such as the Czech Republic and Denmark, as a reference point when formulating improvement recommendations.
Next step
Want to know where your building stands?