Today, we find ourselves at a point where sustainability has ceased to be a trend and has become an absolute necessity. In residential communities, energy conservation has become paramount, driven largely by public aid programs and Next Generation EU funds , which make renovating older buildings much more feasible than it was a few years ago.
The truth is that, in the past, homeowners were reluctant to invest in energy efficiency because the cost was spread among many people and didn't seem like an urgent problem. However, when we look at the energy bill from a global perspective , we realize that the savings are massive and that any small improvement adds value to the property and improves the quality of life for everyone.
Energy auditing: the roadmap to avoid blind guesswork
Before spending a single euro, it's essential to conduct an energy audit. This is simply a comprehensive analysis of how energy is used in the building, reviewing everything from lighting and elevators to the building envelope . It's the logical first step to identify energy leaks and prioritize investments that will provide the fastest return on investment.
Thanks to this study, the community can identify equipment that is already obsolete or detect phantom consumption in common areas , allowing the administrator and the president to make decisions based on real data and not on assumptions, also ensuring compliance with current regulations.
Improving insulation: preventing heat from escaping
There's no point in cranking up the heating if the building is leaking like a sieve. Thermal insulation is probably the most cost-effective long-term investment. One of the most effective solutions is ETICS (External Thermal Insulation Composite System) , which creates a barrier against the outside temperature, preventing the cold from entering in winter and the heat from being stifling in summer.
In addition to the facades, it's crucial to replace old windows with models featuring thermal break and double glazing , supported by efficient window management . These improvements not only reduce energy bills but also eliminate troublesome problems like condensation and mold, making apartments much more comfortable and increasing their market value.
Smart lighting and common area management
Common areas, such as garages, entrance halls, and storage rooms, are often sources of unnecessary energy consumption. Replacing traditional light bulbs with LED technology can result in savings of up to 70% , as they consume significantly less energy and last much longer. However, simply changing the bulb isn't enough; you also need to manage when the lights are switched on.
Installing motion sensors and timers ensures that lights are only on when someone is actually present. Similarly, zoning the lighting in large garages allows only the areas where users are located to be illuminated, maximizing energy efficiency.
Air conditioning and domestic hot water (DHW) systems
The boiler room is where the biggest expense is usually concentrated. Replacing old oil or gas boilers with air source heat pumps or geothermal systems is a huge leap forward. These systems harness energy from the air or the ground to heat water and the home with surprising efficiency.
It is advisable to switch from individual systems to well-regulated centralized systems and ensure that all distribution pipes are properly insulated to prevent heat loss. Adjusting temperatures according to regulations and performing regular maintenance prevents equipment from working excessively, reducing consumption by 7% to 9%.
The promotion of renewable energies and self-consumption
Once a building is energy efficient and no longer loses energy, it's time to generate its own. Installing photovoltaic solar panels on the roof is now more cost-effective than ever due to the drop in component prices. This allows the building to power the elevator and common areas with clean energy.
A growing trend is the creation of energy communities , where several buildings join together to buy and sell the electricity they produce. The use of storage batteries allows this energy to be harnessed even when there is no sun, making the community virtually self-sufficient in its basic energy needs.
Responsible habits and smart management of daily life
Technology helps, but the behavior of our neighbors is the perfect finishing touch. Encouraging people to turn off unnecessary lights and use appliances during off-peak hours makes all the difference. Small gestures, like not putting hot food in the refrigerator or using a washing machine with artificial intelligence to optimize energy consumption , add up to considerable savings.
To maintain tight control, implementing energy management software (EMS) allows for real-time monitoring of energy consumption. Detecting abnormal consumption spikes helps to react quickly to breakdowns and allows the administrator to present clear reports on the savings achieved thanks to the implemented measures.
Taking advantage of grants and technical advice
Undertaking these projects can be daunting due to the initial cost, but incentives such as Energy Saving Certificates (CAE) and PREE grants can finance a significant portion of the investment. In some cases, especially in areas at risk of energy poverty, these grants can cover up to 100% of the project's cost.
Having a specialized energy partner is the best way to avoid getting lost in the bureaucratic maze of subsidies. These experts not only install the technology but also optimize the building's energy strategy to ensure the payback period is as short as possible, sometimes cutting it in half thanks to subsidies.
The combination of an efficient thermal envelope, the replacement of obsolete equipment with aerothermal systems, the implementation of solar energy, and digital consumption control allows a community to reduce its electricity costs by up to 50%, transforming old buildings into sustainable, more valuable, and much more comfortable buildings for all its residents.