Key factors that made this project a winner

The Hotel Puerta de Toledo project is a winner because it demonstrates that genuine sustainability is neither a passing fad nor a recent trend, but a long-term commitment, implemented with consistency, courage and tangible results in a complex environment such as Madrid’s historic centre.

In a building over half a century old, the hotel has managed to evolve without losing its essence, building a model of responsible tourism that began long before sustainability was a market requirement, as evidenced by the Community of Madrid Environment Award received back in 2004, and which today reaches its fullest expression with an A energy rating, following a comprehensive energy refurbishment culminating in the installation of an aerothermal system in 2025.

This exceptional milestone is underpinned by a global strategy that combines major transformative investments – such as improving the building envelope through the complete replacement of windows or the removal of conventional energy systems – with day-to-day decisions that multiply the impact: 100% efficient lighting, optimised water use, the elimination of single-use plastic products, the consumption of locally sourced filtered water in glass bottles, and programmes that invite guests to play an active part in the change.

All this has been achieved without compromising on comfort, enhancing the traveller’s experience, the project’s economic sustainability and the well-being of the people who make it possible every day. The Hotel Puerta de Toledo does not merely proclaim sustainability: it practises it, measures it and consolidates it, demonstrating that even in the most demanding buildings it is possible to lead a real transformation.

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Because when a commitment is upheld for decades and translated into action, sustainability ceases to be a goal and becomes a legacy.

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Measures and initiatives that have been implemented in the areas of economic, social and environmental responsibility

The Hotel Puerta de Toledo maintains a firm, ongoing commitment to sustainability, understood as a genuine balance between economic responsibility, positive social impact and environmental respect. This commitment has been part of its identity for more than two decades and has been consolidated through coherent, measurable strategic decisions over time.

On the environmental front, this stance was already recognised in 2004, when the hotel received the Community of Madrid Environmental Award, presented jointly by the Madrid Chamber of Commerce and CEIM (Confederación Empresarial de Madrid‑CEOE). That recognition — particularly significant for its time — endorsed a responsible management approach when sustainability was not yet a central concern in the hotel sector.

Since then, the hotel has continued to progress through structural investments that reinforce this commitment. In 2024, all exterior windows were completely replaced with PVC frames featuring thermal breaks and improved acoustic performance, resulting in a significant enhancement of the building envelope’s efficiency, a reduction in non‑renewable primary energy consumption and a marked increase in thermal and acoustic comfort.

In 2025, the Hotel Puerta de Toledo took a decisive step towards decarbonisation by implementing a comprehensive air‑source heat pump (aerothermal) system, replacing conventional thermal equipment with a highly efficient renewable technology for domestic hot water production. This project has resulted in an energy efficiency rating of A, a particularly significant achievement for a historic hotel building in the centre of Madrid.

These interventions are complemented by day‑to‑day operational measures aimed at reducing consumption and waste:

• All the hotel’s lighting is energy-efficient, and motion-sensor lights have been installed in communal areas to prevent unnecessary energy consumption.

• Water aerators have been fitted to optimise water usage without compromising the guest experience.

• Single-use items have been phased out and replaced with more sustainable alternatives.

• Water is provided to guests in glass bottles, sourced from Km0 filtered water, reducing plastic waste and the transport footprint.

• A guest engagement programme invites guests to opt out of daily room cleaning for stays of two nights or more, offering a complimentary drink in exchange, and encouraging conscious participation in reducing water, energy and cleaning product consumption.

From an economic perspective, all these measures respond to a responsible, long‑term investment model focused on operational efficiency, lower structural energy costs and preservation of asset value — ensuring the business’s sustainability without compromising service quality.

On the social side, the hotel promotes a people‑centred hospitality model: guests, staff and the surrounding urban community. The improvements implemented contribute to healthier, more comfortable environments, enhancing the guest experience in line with the values of responsible tourism and the expectations of increasingly conscious travellers.

Together, the Hotel Puerta de Toledo’s journey demonstrates that sustainability is not a one‑off action but a coherent, progressive and committed process capable of generating a real, lasting impact in the heart of Madrid.

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Project objectives

An exceptional energy-efficiency refurbishment at a historic hotel in Madrid

In the urban context of Madrid, achieving an A energy rating for a hotel located in a building over 50 years old is an extraordinary and rare achievement, both from a technical perspective and in terms of its real impact on sustainable tourism.

Madrid has one of the oldest building stocks in Spain, particularly in the central districts, where a large proportion of the city’s hotels are concentrated. Many of these buildings were constructed before energy efficiency regulations existed, without criteria for thermal insulation, consumption optimisation or the integration of renewable energy. This reality makes any major improvement a highly complex structural challenge.

Buildings used for hotel purposes also present specific constraints: continuous operation throughout the year, high demand for air conditioning, intensive domestic hot water production and high standards of comfort. As a result, even after refurbishment, most existing hotels in Madrid achieve only intermediate energy ratings, with very few managing to attain an A rating without being new builds.

Achieving this rating in a historic building is only possible through a comprehensive energy refurbishment, which goes beyond partial improvements and involves a genuine transformation of the property’s energy model.

In our case, this milestone has been achieved thanks to the comprehensive installation of an aerothermal system, based on high-efficiency heat pumps capable of meeting the needs for air conditioning and domestic hot water in a renewable and decarbonised manner. This project has enabled a significant reduction in the consumption of non-renewable primary energy and the emissions associated with the hotel’s operation, substantially improving its overall energy performance.

 

Achieving maximum energy efficiency in a historic building in Madrid redefines what hotel excellence means today.

It is a strategic statement on how we view the future of tourism.

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Benefits achieved through project implementation

The project represents a significant step forward in energy efficiency and decarbonization for a 3-star hotel located in the center of Madrid, within a building with major construction constraints.

 

The replacement of all façade windows has substantially improved the building’s thermal performance, reducing energy losses, heating and cooling demand, and primary energy consumption. This intervention has increased thermal and acoustic comfort for guests and staff and enabled more efficient year-round operation. As a result, non-renewable primary energy consumption has been reduced by 32%, achieving annual savings of 102,600 kWh and reaching an energy efficiency rating of CEE B.

 

The implementation of a domestic hot water production and storage system based on aerothermal technology represents a decisive step toward decarbonization. Replacing conventional thermal systems with a high-efficiency renewable solution has eliminated dependence on diesel fuel, significantly reducing non-renewable energy consumption and direct CO₂ emissions while maintaining reliability and comfort. This system provides 70.78% renewable energy on an annual basis, meets the objectives of the Spanish Technical Building Code (CTE), and enables the hotel to achieve the highest energy efficiency rating, CEE A, with average annual savings of 108,300 liters of diesel for domestic hot water production.

 

Overall, the project transforms the hotel’s energy model, measurably reduces its environmental footprint, and demonstrates that sustainability is both viable and measurable in existing urban hospitality.

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A distinctive feature of the project

The real distinguishing feature of this project lies in having achieved an A energy rating for a hotel housed in a building over 50 years old in the city of Madrid, where architectural, technical and urban constraints make such achievements exceptionally rare.

Madrid is a city of historic buildings, designed at a time when energy efficiency was not a consideration. In this context, transforming an existing hotel—which operates continuously and has high comfort requirements—into a building of maximum efficiency presents a challenge that goes far beyond a technical upgrade: it requires a strategic decision and a clear vision for the future.

This project has not relied on piecemeal measures or superficial solutions, but on a comprehensive energy refurbishment aimed at fundamentally changing the building’s energy model. The full-scale implementation of an aerothermal system has enabled the replacement of conventional systems with a renewable and highly efficient solution, capable of meeting domestic hot water needs in a carbon-free manner, without compromising the guest experience.

Opting for this type of solution in a historic building entails taking on a level of complexity that is unusual in Madrid’s hotel sector, where most interventions are limited to incremental improvements. Here, the commitment has been total: to reduce the environmental impact in a real and measurable way, minimise the consumption of non-renewable energy, and move towards a model of responsible tourism aligned with major urban challenges.

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Continuity and sustainability of the project

The ongoing success of the Hotel Puerta de Toledo project is based on a simple yet profound idea: to keep moving forward whilst remaining true to who we are. Sustainability will continue to be a natural part of the way we manage, make decisions and welcome guests, becoming an integral part of the hotel’s day-to-day operations with the same consistency and commitment that has brought us this far. In the coming years, we will remain attentive to technical, regulatory and social developments that may help us evolve, always assessing them from a responsible, realistic perspective that is aligned with our values. It is not about change for change’s sake, but about meaningful improvement, consolidating what we have already achieved and adapting judiciously to continue reducing our impact and looking after people. In this way, the Hotel Puerta de Toledo will continue to demonstrate that the most valuable sustainability is that which endures over time, because it stems from commitment and remains true to its identity.

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To stay true to our core values, evolve in a consistent manner, and continue to build a responsible future, step by step.

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