Commercial & Industrial buildings

Energy efficient building definition An energy efficient building is a facility designed and operated to minimise energy use while maintaining optimal comfort, safety and operational performance. Its efficiency is achieved through a combination of intrinsic qualities such as insulation, airtightness, high-performing HVAC systems and efficient lighting and operational factors including accurate metering, continuous monitoring and data-driven control strategies.

An energy efficient building reduces losses across the electrical distribution system, ensures the stable operation of critical loads, and adapts consumption to real needs rather than fixed schedules. It also integrates renewable energy sources where relevant and supports flexible use of energy through intelligent automation and storage.

Ultimately, an energy efficient building consumes less energy for the same level of service, demonstrates measurable performance improvements over time, and provides organisations with a more predictable, resilient and sustainable operating environment.

The European Commission states that “collectively, buildings in the EU are responsible for 40 % of our energy consumption …”. They deliver immediate and long-term value across financial, regulatory and operational dimensions.

For operators, reduced energy consumption directly lowers operating expenses and limits exposure to energy price volatility.

From a regulatory perspective, European directives such as the EPBD and EED require buildings to monitor and improve their performance, making efficiency a compliance requirement rather than an optional upgrade. 

Energy efficient buildings also support ESG objectives and mandatory reporting frameworks such as CSRD, GRI and IFRS sustainability regulations. Their ability to provide reliable, auditable data strengthens transparency for investors, tenants and public authorities. 

Beyond compliance and cost savings, efficient buildings reduce environmental impact, integrate renewables more effectively and deliver improved long-term performance and stronger asset value.

Rising energy costs 

Energy represents, on average, 30% of the total operating expenses of a commercial building. These are fixed and unavoidable costs, directly affecting competitiveness and financial sustainability. With rising prices and increased volatility, improving energy efficiency is becoming a decisive lever for stabilising budgets and strengthening energy security. 

The growing influence of new technologies on building performance 

Modern buildings integrate more advanced equipment than ever before: EV charging stations, heat pumps, IT rooms, automated systems and a growing number of IoT devices. These technologies within the buildings generate new, high-density loads, create peak consumption periods and put pressure on electrical infrastructures that were often designed decades earlier. 

Industrial modernisation and its impact on energy needs 

In manufacturing environments, the introduction of robots and automated processes significantly increases electricity consumption and associated emissions. Without targeted measurement and control, these loads create inefficiencies, resulting in additional costs and power quality issues that impact both production reliability and energy performance. 

Compliance demands accelerating mandatory energy monitoring 

Across Europe, regulations now impose mandatory audits, performance tracking and continuous improvement. Monitoring is no longer optional: it is essential to reveal hidden consumption, identify optimisation opportunities, manage peak loads and ensure long-term compliance with frameworks such as EPBD, EED or CSRD. 

A new era for energy management in buildings 

Buildings are becoming more complex, more electrified and more digital — and this evolution requires a new approach to energy performance. Reliable measurement, interoperable monitoring systems and proactive optimisation strategies are now essential to maintain performance, guarantee availability and manage long-term sustainability.

Improving a building's energy efficiency starts with a detailed understanding of how energy is produced, distributed and consumed across the facility. 

The first step is to implement accurate, compliant metering systems to measure electricity and key loads at the right granularity. Data becomes meaningful only when it flows seamlessly into supervisory platforms, which is why interoperability between metering systems and existing BMS or EMS is essential. 

Monitoring converts data into operational intelligence. It is essential for multi-site portfolios, complex buildings and industrial environments. It is also the only way to meet EPBD and EED requirements and deadlines. 

Benefits can resume like this: 

- centralise energy performance data 

- detect irregularities and drifts automatically 

- validate savings and measure progress 

- optimise consumption according to real-world usage 

- ensure traceability for ESG reporting and compliance 

- achieve interoperability between metering systems and existing BMS/EMS 

- support contractual commitments for ESCOs

Facility Managers and ESCOs also rely on continuous monitoring to track progress, validate results and proactively prevent performance drifts. 

Once measured, energy flows can be monitored through a supervision system that detects anomalies, identifies optimisation opportunities and supports decision-making. 

Efficiency improvements often include reducing electrical losses, upgrading insulation, recalibrating HVAC systems, improving control strategies, and adjusting operation schedules to match occupancy patterns. Integrating renewable energy sources and storage can further reduce dependency on the grid and support peak load management. 

Combined, these measures create a continuous improvement loop that reduces consumption, stabilises operations and strengthens long-term energy performance.

From an energy audit perspective, a building is considered energy efficient when its systems operate with minimal waste and its performance is both measurable and verifiable. It starts with the fundamentals: a stable and well-designed electrical distribution network that limits losses, maintains voltage quality and protects critical loads. 

Intrinsic qualities are, however, only half of the equation. 

An energy efficient building must also have a robust measurement infrastructure capable of accurately capturing consumption at circuit, equipment and zone level. Without reliable metering, it is impossible to confirm where energy is being used or lost. Equally important is the ability of metering systems to interoperate with the BMS or EMS, ensuring that data is consolidated, analysed and used to drive automatic or manual optimisation actions. 

Finally, an efficient building is one that adapts. Its HVAC, lighting and technical systems are controlled according to real occupancy and operational needs, its loads are monitored continuously, and deviations are corrected quickly. When these elements are aligned efficient design, accurate measurement, interoperable control and proactive supervision the building achieves sustained, demonstrable energy performance.

A building’s energy performance depends on the balance between its electrical distribution, its consumption patterns and its capacity to measure and control energy flows in real time. Four key components define this performance. 

Electrical distribution and power quality 

The way that energy is distributed inside the building directly affects losses, stability and equipment lifetime. A reliable architecture ensures the continuity of service for critical loads and prevents performance drifts. 

Efficient energy use - consumption profiles and major loads 

HVAC, lighting, industrial processes, IT systems, EV charging: each category behaves differently. Understanding when and how energy is used is essential when it comes to identifying the most effective optimisation levers. 

Building envelope and operational conditions 

Thermal performance, occupation patterns and environmental conditions influence heating, cooling and ventilation needs. These factors heavily impact the overall energy profile of the building. 

Measurement, control and automation systems

 Accurate metering and automated control are the backbone of energy efficiency. They enable transparency, comparison, regulatory compliance and ongoing optimisation.

A comprehensive electrical audit is the starting point for any improvement plan. It reveals hidden consumption, operational anomalies and opportunities for cost-effective optimisation.

Reducing the energy consumption of your buildings

The audit identifies inefficiencies, load imbalances, control failures and deviations that increase energy use. It supports the definition of a clear, prioritised action plan adapted to your operational realities.

Energy efficiency ratings for buildings

A building’s energy efficiency rating reflects how well it performs in terms of energy use, thermal comfort, operational control and overall environmental impact.

Beyond traditional consumption indicators, the Smart Readiness Indicator (SRI) introduces an additional layer by assessing how effectively a building can adapt its operation to occupants’ needs, react to external signals and optimise its energy flows.

A strong rating requires reliable metering, interoperable systems, and the capacity to automate responses across HVAC, lighting, storage and on-site generation. Together, these elements provide a measurable view of performance and demonstrate the building’s readiness to operate efficiently, flexibly and sustainably.

Optimising building self-consumption

Analysing energy flows helps determine the potential for renewable integration and the strategies required to maximise the use of locally produced energy, reduce grid dependency and stabilise the energy profile.