This is how the energy label works, transforming the way we live and use energy

When we talk about sustainability, we tend to think of solar energy, waste, transport, or biodiversity. However, there is one area that often goes unnoticed but has a far greater impact than we realise: the energy efficiency of buildings. Homes, offices and holiday accommodation account for a significant proportion of global energy consumption, and understanding how they work from the inside is essential for reducing emissions and saving money. This is where the energy performance certificate comes in—a mandatory and, above all, very useful document.

The certificate is, in essence, a snapshot of a property's energy performance. It assesses the energy required to run the building—heating, cooling, hot water, ventilation and lighting—and calculates the associated CO₂ emissions. This data is then used to create the energy label—the same colour-coded scale found on household appliances: from A (very efficient) to G (very inefficient). Simple language for a complex concept.

But beyond simply complying with the regulations, why should we care? To begin with, an energy-efficient home not only uses less energy, it is also more comfortable. It maintains the temperature more effectively, reduces noise, prevents damp, and allows for a more efficient use of resources. And in a world where energy costs can change from one day to the next, this information is worth its weight in gold for any family or homeowner.

The energy label works like a traffic light: if two homes have similar characteristics, but one is rated C and the other F, the difference in annual energy consumption can be huge. This helps buyers and renters make informed decisions, just as a driver checks a car’s fuel consumption before buying it. In the Balearic Islands, this factor is even more significant: buildings are subject to hot summers, humid winters and significant climatic variations between regions, which means that energy efficiency depends heavily on orientation, insulation, and building materials.

Furthermore, the certificate does more than just assess; it also suggests measures for improvement. Sometimes it is enough to replace the windows and doors, install a more efficient system or improve the insulation; other times, it is advisable to switch to renewable energy or replace outdated equipment. Each recommendation includes a calculation of the savings and an estimated return on investment, which is essential for anyone to assess what is actually worthwhile.

Tools like these have revolutionised the way we interact with our buildings. In the past, energy efficiency was a technical concept—difficult to understand and, above all, invisible. Today, the label makes sustainability accessible, comparable and practical. A homeowner can improve their home, a tourist can choose energy-efficient accommodation, and a local council can reward energy-efficient renovations with grants and tax breaks.

Furthermore, the certificate links us to a wider debate: the role of buildings in the fight against climate change. It is estimated that around 40% of the energy consumed in Europe comes from the residential and services sectors. Improving energy efficiency is not just an individual effort, but a strategic pillar for reducing emissions on a large scale. In this sense, the energy label becomes a tool for collective reflection: it reminds us that sustainability starts at home.

For the Balearic Islands, where tourism and housing play a major role, energy efficiency is also an economic opportunity. A property with an A or B rating is more competitive, more comfortable, and cheaper to run. And in a tourism market that is increasingly focused on sustainability, this difference matters.

Looking ahead, the European Union is moving towards stricter standards and a large-scale renovation of its building stock. Along the way, the certificate will be an indispensable tool for understanding where we stand and what we need to improve. Its value lies not only in the final rating, but in the conversation, it sparks: What do we want our homes to be like in ten years’ time? How much energy are we prepared to keep wasting? What role do we want our individual decisions to play in the sustainability of the region?

The energy performance certificate does not solve all these challenges, but it does shed light on them. And this clarity is the first step towards a future that is more efficient, more comfortable and more environmentally friendly.