--- title: BACS in hotels: energy efficiency and regulation source_url: https://voltic.es/en/blog/los-bacs-no-son-una-opcion-se-convierten-en-la-nueva-columna-vertebral-de-la-eficiencia-en-los-hoteles generated_at: 2026-09-12T04:09:58+00:00 --- BACS in hotels: energy efficiency and regulation | Voltic 🏆 Awarded the [2026 EmprendeXXI Award by ENISA/CaixaBank](/press-releases/voltic-wins-the-emprendexxi-2026-retos-del-manana-award-in-tourism-and-mobility) Published in [ Energy Efficiency ](/) BACS in hotels: energy efficiency and regulation ================================================ What Directive (EU) 2024/1275 means for hotel BACS, how scope and evidence should be assessed, and why energy results must be measured by project. By [Kléber Guzmán](https://voltic.es/#organization) 28/11/2025 **European Directive 2024/1275 and the role of BACS in hotels** --------------------------------------------------------------- --- Energy management is becoming a core operational issue for hotels. Directive (EU) 2024/1275 creates a European framework for improving the energy performance of buildings and for using building automation and control systems (BACS) where the applicable requirements call for them. > **Scope and evidence note:** The exact obligations depend on the building’s thermal output, use, equipment, applicable deadlines, exceptions and national transposition. This article is educational, not legal advice. Project results, savings and payback vary by building, climate, equipment, occupancy, tariffs, baseline and measurement period. Voltic does not publish identifiable client data here. ### **A regulatory framework with practical consequences** The Directive sets a path towards a zero-emission European building stock by 2050. For hotels and other non-residential buildings, the relevant requirements must be assessed against the official text and the rules applicable in each country. BACS are not only a technology choice. When required or selected for a project, they can help operators monitor energy use, detect deviations, coordinate building systems and respond to changing occupancy. ### **What hotel operators should assess** A practical assessment should cover: #### **1. Continuous energy monitoring** A BACS can: - Monitor relevant heating, ventilation and cooling consumption. - Produce comparative reports showing trends, deviations and anomalies. - Record the data sources, calibration status and validation process. - Make the monitoring scope clear instead of presenting a universal percentage. #### **2. Historical data and traceability** Energy data should be retained for the period required by the applicable rules and the project’s governance model. A robust setup normally includes: - Digital storage with access controls. - Meter validation and data-quality checks. - Traceability of consumption, alarms and control events. #### **3. Automatic adjustment and intelligent response** Depending on the installed equipment and control strategy, the system may: - Detect efficiency losses. - Suggest or apply operational improvements. - Adjust setpoints, schedules and ventilation according to occupancy and operating conditions. - Optimise energy use while preserving comfort and safety. Occupancy-based control can reduce HVAC demand in some buildings, but the result is project-specific. It should be reported with a baseline, measurement period, building conditions and methodology rather than as a guaranteed percentage. #### **4. Interoperability and secure access** A BACS should be assessed for: - Open or documented communication protocols. - Integration with other building systems. - Secure remote access and appropriate user permissions. - Clear ownership of data and control actions. #### **5. Complete technical documentation** A project may need: - Control plans and diagrams. - Equipment and point lists. - Energy and commissioning reports. - Evidence supporting the applicable compliance assessment. The required documents and inspection process depend on the building and the national implementation of the rules. ### **Costs, savings and payback** Energy costs and payback are not fixed properties of a hotel or a BACS. They depend on the building envelope, equipment, operating schedule, climate, tariffs, occupancy, control quality and the baseline used for comparison. For that reason, public claims should identify the project conditions and measurement method. Voltic’s hotel data is aggregated internally; client-level figures are not presented as a public benchmark in this article. ### **A practical way to move forward** Hotel operators can start by: 1. Identifying the building systems, thermal output and current controls. 2. Checking the applicable national requirements against the official Directive. 3. Establishing a documented energy baseline. 4. Defining the controls, data quality checks and success criteria. 5. Reviewing results after a defined measurement period and updating the operating strategy. In this context, BACS can be a regulatory enabler and an operational tool. The right design is the one whose scope, evidence and limitations are clear. ### **Source** - [Directive (EU) 2024/1275 on the energy performance of buildings (EUR-Lex)](https://eur-lex.europa.eu/eli/dir/2024/1275/oj) ### Sidebar #### Could interest you [ ![Voltic wins the EmprendeXXI 2026 Retos del Mañana Award in Tourism and Mobility](https://voltic.es/cdn-cgi/image/width=96,height=96,fit=crop,format=auto,quality=80/https://cdn.voltic.es/uploads/public/6a1/98d/be6/6a198dbe6032a228981981.jpg) ](https://voltic.es/blog/voltic-wins-the-emprendexxi-2026-retos-del-manana-award-in-tourism-and-mobility)##### [Voltic wins the EmprendeXXI 2026 Retos del Mañana Award in Tourism and Mobility](https://voltic.es/blog/voltic-wins-the-emprendexxi-2026-retos-del-manana-award-in-tourism-and-mobility) The Mallorca-based company has received national recognition for its wireless hotel automation syste... 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