Gibt es in Deutschland eine BACS-Pflicht (Gebäudeautomation Nachrüstpflicht)?

Yes. Under EPBD Directive 2024/1275 Article 13, Germany must require building automation and control systems (Gebäudeautomation) in non-residential buildings whose technical building systems exceed defined capacity thresholds. The 290 kW threshold has applied since 31 December 2024, and the much broader 70 kW threshold applies from 31 December 2029. The directive is transposed into German law primarily through the Gebäudeenergiegesetz (GEG), with the 2024 EPBD recast implemented through amendments to that act. So while it is commonly described as a Nachrüstpflicht (retrofit obligation), the legal driver is the EPBD as transposed by the GEG, not a standalone BACS law.

Welche Gebäude fallen unter die 70-kW-Schwelle?

The threshold is based on the combined effective rated output (Nennleistung) of the building's heating, ventilation, air-conditioning, and combined systems. Any non-residential building whose total exceeds 70 kW is in scope from the end of 2029 — for example a 120 kW heating system plus a 60 kW cooling system gives 180 kW, well above the line. In practice this captures the bulk of German commercial stock: offices, retail and shopping centres, hotels, hospitals, schools and universities, logistics centres, and industrial buildings with significant HVAC load. Residential buildings are excluded, and mixed-use buildings are assessed only on their non-residential portion.

Was zählt als konforme Gebäudeautomation?

A compliant system must reach at least Class C of EN ISO 52120-1 (formerly EN 15232), which ranks automation from Class A (high performance) to Class D (non-efficient). Class C is the minimum, so Class D systems or buildings with only timers and standalone thermostats are the primary upgrade targets. Functionally, the system must continuously monitor energy consumption, benchmark it against expected performance, detect faults and efficiency drift, give operators actionable information, and enable demand-based control of HVAC. A simple time-clock BMS does not qualify because it cannot monitor, report, or adapt.

Welche Förderung gibt es für die Gebäudeautomation (BAFA, KfW)?

Several German programmes can offset the cost of a BACS upgrade. The Bundesförderung für effiziente Gebäude (BEG), administered through BAFA and KfW, supports energy-efficiency measures including building automation and control technology, and depending on the programme and building type can cover roughly 15–40% of eligible costs. dena (Deutsche Energie-Agentur) maintains the energy-efficiency expert registry and publishes guidance, and energy audits under the EDL-G increasingly bring BACS readiness into scope for large enterprises. Because funding budgets and rates change, confirm current BEG conditions before budgeting — and apply early, ahead of the expected 2029 rush.

What happens if a building misses the 2029 BACS deadline?

From the deadline, an in-scope building without a compliant system is non-compliant with the GEG as it transposes EPBD Article 13. Enforcement in Germany runs through the building-energy regime and the regular inspection of heating and air-conditioning systems, alongside documentation obligations. Beyond the legal exposure, the practical costs are immediate: continued energy waste, higher running costs, missed BEG funding windows, and weaker positioning in transactions where energy performance is scrutinised. Because automation projects take months to scope, fund, procure, and commission, owners above 70 kW who wait until 2029 are likely to run late.

Country Guide

BACS Requirements in Germany

The recast Energy Performance of Buildings Directive (EPBD 2024/1275) requires building automation and control systems in non-residential buildings across the EU. Here is how it applies in Germany, what the deadlines are, and what building owners need to do.

The first deadline has already passed

Since 31 December 2024, non-residential buildings with HVAC systems above 290 kW effective rated output are required to have building automation and control systems under EPBD Article 13. Buildings in this category that have not acted are already non-compliant.

Legal basis

The requirement comes from Directive (EU) 2024/1275, the recast Energy Performance of Buildings Directive (EPBD). Article 13 mandates that EU member states require non-residential buildings to equip relevant technical building systems with building automation and control systems where technically and economically feasible.

In Germany, the EPBD is transposed through the Gebäudeenergiegesetz (GEG) — the Building Energy Act. The GEG consolidates earlier regulations (EnEV, EEWärmeG) and is the primary legal instrument for building energy performance requirements. Updates to the GEG to reflect the 2024 EPBD recast are expected through federal implementation measures.

The technical standard referenced for BACS classification is EN ISO 52120-1 (formerly EN 15232), which defines four BACS efficiency classes (A through D). Class C is the minimum acceptable level under the directive — buildings with Class D systems or no automation are the primary targets for mandatory upgrade.

Deadlines and thresholds

Threshold	Deadline	Status
HVAC effective rated output >290 kW	31 December 2024	Passed
HVAC effective rated output >70 kW	31 December 2029	Approaching

The >70 kW threshold is the critical wave for Germany. It captures a much larger number of commercial buildings — offices, retail, hotels, logistics centres, hospitals, and schools — that were previously below the regulatory threshold.

Which buildings are affected?

The BACS requirement applies to non-residential buildings where the effective rated output of the relevant technical building systems exceeds the threshold. In Germany, this includes:

Office buildings and commercial premises
Retail and shopping centres
Hotels and hospitality
Hospitals and healthcare facilities
Schools, universities, and public buildings
Logistics centres and warehouses with conditioned space
Industrial buildings with significant HVAC load

Residential buildings are excluded from the BACS mandate. Mixed-use buildings are assessed based on the non-residential portion.

The "effective rated output" refers to the combined capacity of heating, ventilation, air conditioning, and hot water systems serving the building. A building with a 120 kW heating system and a 60 kW cooling system has an effective rated output of 180 kW and falls within the >70 kW threshold.

What counts as a compliant BACS?

A compliant building automation and control system must, at minimum, achieve EN ISO 52120-1 Class C or better. This means the system should be capable of:

Continuous monitoring of energy consumption
Benchmarking against expected performance
Detecting faults, losses, and efficiency drift
Providing actionable information to operators
Enabling demand-based control of HVAC systems

A basic timer-based BMS or standalone thermostats do not meet the requirement. The system must actively monitor, report, and support optimisation — not just switch equipment on and off.

Germany-specific context

Germany has the largest non-residential building stock in the EU. Key facts for building owners and consultants:

GEG (Gebäudeenergiegesetz) is the transposing legislation. Amendments reflecting the 2024 EPBD recast are expected to formalise BACS obligations at national level.
BAFA (Bundesamt für Wirtschaft und Ausfuhrkontrolle) administers energy efficiency funding programs including BEG (Bundesförderung für effiziente Gebäude) which can offset BACS upgrade costs.
dena (Deutsche Energie-Agentur) maintains the energy efficiency expert registry and publishes guidance on building automation.
Energy audits under the EDL-G (Energiedienstleistungsgesetz) already require large enterprises to audit every 4 years. BACS readiness is increasingly part of audit scope.
KfW and BAFA grants can cover 15–40% of BACS upgrade costs depending on the program and building type.

What should building owners do now?

Determine your HVAC rated output. Sum the effective rated output of all heating, cooling, ventilation, and hot water systems. If it exceeds 70 kW, you are in scope for 2029.
Assess your current automation level. Do you have a BMS? Does it monitor, detect faults, and report to operators? Or is it just timers and thermostats?
Check available funding. BEG programs through BAFA and KfW can significantly reduce net investment. Apply before the 2029 rush.
Plan the upgrade path. A phased approach — monitoring first, then optimisation — is often more practical than a full BMS replacement.
Document everything. Evidence of compliance (system diagrams, trend logs, commissioning records) will be needed when enforcement begins.

Frequently asked questions

Common questions on the BACS-Pflicht, the GEG, deadlines, and funding in Germany.

Gibt es in Deutschland eine BACS-Pflicht (Gebäudeautomation Nachrüstpflicht)?: Yes. Under EPBD Directive 2024/1275 Article 13, Germany must require building automation and control systems (Gebäudeautomation) in non-residential buildings whose technical building systems exceed defined capacity thresholds. The 290 kW threshold has applied since 31 December 2024, and the much broader 70 kW threshold applies from 31 December 2029. The directive is transposed into German law primarily through the Gebäudeenergiegesetz (GEG), with the 2024 EPBD recast implemented through amendments to that act. So while it is commonly described as a Nachrüstpflicht (retrofit obligation), the legal driver is the EPBD as transposed by the GEG, not a standalone BACS law.
Welche Gebäude fallen unter die 70-kW-Schwelle?: The threshold is based on the combined effective rated output (Nennleistung) of the building's heating, ventilation, air-conditioning, and combined systems. Any non-residential building whose total exceeds 70 kW is in scope from the end of 2029 — for example a 120 kW heating system plus a 60 kW cooling system gives 180 kW, well above the line. In practice this captures the bulk of German commercial stock: offices, retail and shopping centres, hotels, hospitals, schools and universities, logistics centres, and industrial buildings with significant HVAC load. Residential buildings are excluded, and mixed-use buildings are assessed only on their non-residential portion.
Was zählt als konforme Gebäudeautomation?: A compliant system must reach at least Class C of EN ISO 52120-1 (formerly EN 15232), which ranks automation from Class A (high performance) to Class D (non-efficient). Class C is the minimum, so Class D systems or buildings with only timers and standalone thermostats are the primary upgrade targets. Functionally, the system must continuously monitor energy consumption, benchmark it against expected performance, detect faults and efficiency drift, give operators actionable information, and enable demand-based control of HVAC. A simple time-clock BMS does not qualify because it cannot monitor, report, or adapt.
Welche Förderung gibt es für die Gebäudeautomation (BAFA, KfW)?: Several German programmes can offset the cost of a BACS upgrade. The Bundesförderung für effiziente Gebäude (BEG), administered through BAFA and KfW, supports energy-efficiency measures including building automation and control technology, and depending on the programme and building type can cover roughly 15–40% of eligible costs. dena (Deutsche Energie-Agentur) maintains the energy-efficiency expert registry and publishes guidance, and energy audits under the EDL-G increasingly bring BACS readiness into scope for large enterprises. Because funding budgets and rates change, confirm current BEG conditions before budgeting — and apply early, ahead of the expected 2029 rush.
What happens if a building misses the 2029 BACS deadline?: From the deadline, an in-scope building without a compliant system is non-compliant with the GEG as it transposes EPBD Article 13. Enforcement in Germany runs through the building-energy regime and the regular inspection of heating and air-conditioning systems, alongside documentation obligations. Beyond the legal exposure, the practical costs are immediate: continued energy waste, higher running costs, missed BEG funding windows, and weaker positioning in transactions where energy performance is scrutinised. Because automation projects take months to scope, fund, procure, and commission, owners above 70 kW who wait until 2029 are likely to run late.

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Sources & assumptions

Legal context is based on Directive (EU) 2024/1275 Article 13 and publicly available GEG documentation. National implementation details may change as Germany transposes the 2024 EPBD recast. This page was last reviewed May 2026.

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Truth-first source policy

Official sources anchor legal and policy claims. Industry guidance can explain practical readiness, but it is not presented as law. Demo assumptions are labelled and must be replaced with verified project data before decisions.

Review source authority levels

This guide provides indicative planning information only. It does not constitute legal, engineering, or financial advice. Confirm requirements with qualified advisers and official sources (BAFA, dena, BMWi).