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BACS Qualifier

Free online tool: find out in 2 minutes whether your building falls under the BACS decree.

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BACS · EPBD · EN ISO 52120-1

What is a BACS?

A BACS (Building Automation and Control System) controls heating, cooling, ventilation and lighting: it is mandatory in many tertiary buildings.

It measuresIt tracks energy use continuously.
It controlsIt adjusts every system to occupancy and weather.
It alertsIt detects drifts and efficiency losses.

8 steps · about 2 minutes · free, no sign-up

01What is the building mainly used for?

Why this question?

BMS savings depend on use: an office does not save like a hospital.

Did you know?

The directive targets non-residential buildings: they use the most energy outside occupancy hours.

02Where is the building located?

Brussels-CapitalWalloniaFlandersOutside BelgiumNeighbouring countries

Why this question?

The directive is European, but each Region sets its own inspections and exemptions.

Did you know?

In Belgium, the Regions transpose the directive: Brussels-Capital, Wallonia and Flanders.

03What is the heated floor area?

Floor area (m²)

Why this question?

If you don't know your outputs or consumption, we estimate them from the floor area.

Did you know?

The heated floor area covers temperature-controlled spaces, excluding car parks and plant rooms.

04What is the effective rated output of the heating?

Below 70 kWBetween 70 and 290 kWAbove 290 kWI don't knowWe estimate it from the floor area

Why this question?

This is the legal criterion: above 290 kW, mandatory since end 2024; above 70 kW, mandatory end 2029.

Did you know?

The output is on the rating plate of the boiler or heat pump; with several units, add them up.

05And the output of the air conditioning?

Why this question?

The threshold also applies to air conditioning, alone or combined with ventilation.

Did you know?

A building can be concerned because of its air conditioning even if its heating stays below the threshold.

06How is the building controlled today?

No central controlLevel D · manual thermostats, case-by-case settingsBasic controlLevel C · timers, zone control, no supervisionSupervised BMSLevel B · room-by-room control, central supervisionAdvanced BMSLevel A · automatic optimisation, continuous energy tracking

Why this question?

The gap between your level (D to A, EN ISO 52120-1) and the target drives the savings.

Did you know?

BACS requirements correspond in practice to level B: continuous monitoring, analysis, alerts and interoperability.

07What is your annual energy spending?

Heating and cooling (fuels, district heating)

Electricity

I don't know my figures: estimate them

Why this question?

Savings are calculated on your actual spending: the more precise it is, the more precise the report.

Did you know?

Your annual bills are enough; without them, we estimate from the floor area.

08Which level are you aiming for?

Level B · complianceThe level required by the BACS decreeLevel A · high performanceAdvanced optimisation, maximum savings

Why this question?

Level A costs more but saves more: the report compares both.

Did you know?

Going beyond the legal minimum often pays off in intensively used buildings.

Thresholds at a glance

The BACS decree affects many tertiary buildings.

Heating or air-conditioning output	Non-residential building
Above 290 kW	Mandatory since 31 December 2024
Above 70 kW	Mandatory on 31 December 2029
Below 70 kW	No obligation for now

Indicative result (Directive (EU) 2024/1275, Art. 13) that does not replace an analysis of your building; exemptions exist.

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