--- title: Los BACS no son una opción: se convierten en la nueva columna vertebral de la eficiencia en los hoteles. 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: 2026-04-27T16:08:05+00:00 --- Los BACS no son una opción: se convierten en la nueva columna vertebral de la eficiencia en los hoteles. | Voltic 🏆 Awarded the [2026 EmprendeXXI Award by ENISA/CaixaBank](/press-releases/voltic-wins-the-emprendexxi-award-in-the-balearic-islands-in-2026) Published in [ Eficiencia Energética ](/) Los BACS no son una opción: se convierten en la nueva columna vertebral de la eficiencia en los hoteles. ======================================================================================================== By [Kléber Guzmán](#) 28/11/2025 **European Directive 2024/1275 is redefining the energy future of the hotel sector — and the data makes it clear.** ------------------------------------------------------------------------------------------------------------------- --- In recent years, energy management in hotels has become increasingly important. However, with the approval of **Directive (EU) 2024/1275**, this concern is no longer just a strategic issue; it has become a **regulatory imperative.** But the key message goes beyond regulation: **intelligent automation is now the most powerful tool hotels have to remain efficient, competitive and sustainable.** ------------------------------------------------------------------------------------------------------------------------------------------------------------------ ### **A regulatory shift with structural impact** Directive 2024/1275 sets out the roadmap towards a **zero-emission European building stock by 2050**. To achieve this, it introduces very specific measures for non-residential buildings, including hotels, which stand out due to their high energy demand. But the most transformative measure — and possibly the least well known — is the mandatory implementation of **BACS (Building Automation and Control Systems).** This is not just about technology: it is a cultural shift in the way hotels are operated. ----------------------------------------------------------------------------------------- ### **The new obligations directly affecting hotels** According to the Directive, the requirement to have a BACS is triggered depending on the building’s thermal output: #### **✔ Buildings with HVAC systems > 290 kW → mandatory before 31/12/2024** #### **✔ Buildings with HVAC systems > 70 kW → mandatory before 31/12/2029** This places **the vast majority of hotels** at the centre of the regulation. However, the regulation does not merely require the presence of a BACS; it clearly defines **what it must be capable of doing.** -------------------------------------------------------------------------------------------------------------------------------- ### **What exactly does a BACS require under the regulation?** The mandatory functions of building automation and control systems are broad and highly specific. Among the most relevant are: #### **1. Continuous energy monitoring** A BACS must: - Monitor at least **80% of HVAC energy consumption** (heating, ventilation and cooling). - Produce regular comparative reports showing trends, deviations and anomalies. - Ensure that data comes from audited, calibrated and validated systems. Without this monitoring, compliance with the Directive is not possible. ### **2. Historical data logging and retention** Energy data must be stored to enable historical analysis, audits and traceability. This requires: - Digital storage systems. - Meter validation processes. - Traceability of consumption and events. > **Key data point: energy accounts for between 6% and 10% of a hotel’s operating costs** ### **3. Automatic adjustment and intelligent response** The system cannot simply observe. It must: - Detect efficiency losses. - Propose improvements. - Automatically adjust setpoints, schedules and ventilation according to occupancy. - Optimise energy use in real time. Automation becomes the true engine of savings. According to sector studies (ASHRAE / EUBAC), **occupancy-based control reduces consumption by between 20% and 30%**, a particularly effective measure in warm climates. > **Key data point: 50–70% of a hotel’s energy is used for climate control** ### **4. Guaranteed interoperability** A BACS must operate within an open ecosystem: - Non-proprietary communication protocols. - Integration with other building systems. - Secure remote access. The era of closed systems or systems dependent on proprietary programming is definitively behind us. ### **5. Complete and up-to-date technical documentation** The requirements include having: - Control plans and diagrams. - Equipment lists. - Regular energy reports. - Evidence for self-declaration of compliance. The building’s technical inspection will require all this documentation to validate the BACS. --------------------------------------------------------------------------------------------- ### **Beyond compliance: a new approach for hotels** Although the Directive introduces strict obligations, it also represents a significant opportunity for the hotel sector: - Reduced energy consumption. - Greater competitiveness and environmental reputation. - Access to certifications (LEED, BREEAM, ISO 50001). - Alignment with future decarbonisation requirements. Because if energy represents between **6% and 12% of a hotel’s operating costs** (Cornell University), any significant reduction has a direct impact on operating margin. And the evidence is clear: - BACS have an **average payback period of 2–4 years.** - HVAC automation is the intervention with the best ROI in the sector. - Hotels with intelligent systems offer better comfort, reduce incidents and improve guest perception. In addition, buildings that do not comply and fall within the **worst-performing 16% or 26% in terms of energy performance** will be required to carry out deep renovations. In this context, BACS are not just a requirement… They are a strategic tool to anticipate, optimise and remain competitive in an increasingly demanding market. > **Key data point: 75% of European hotels are older buildings with low efficiency** --- ### **Reflection** The European Directive does not simply introduce new rules. It introduces **a new way of understanding energy management in hotels.** In a sector where margins are becoming increasingly tight and sustainability has become a central value, BACS are no longer a technology decision; they are becoming a **pillar of modern hotel management**, turning **operational intelligence into a competitive advantage.** The question is no longer “should we install them?”. The question is: **which hotels will seize this opportunity to lead the change… and which ones will arrive too late?** Voltic is in more than 2,500 hotel rooms and grows every month. Hotels are looking for quick solutions, without construction work and with measurable savings. 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