The city of Guadalajara (Spain) achieved that all its municipal public schools obtain the energy rating A, the highest distinction contemplated in the current regulations. This achievement was made possible thanks to the Guadalajara Heat Network, a centralized thermal infrastructure based on biomass, developed by Rebi, which allows for the continuous, stable, and efficient supply of energy to public buildings.
The centers that already have this certification are: CEIP Ocejón, CEIP Alcarria, CEIP Balconcillo, CEIP El Doncel, CEIP Rufino Blanco, Escuela Infantil Ocejón (Parchís), CEIP Álvar Fáñez de Minaya, and CEIP Pedro Sanz Vázquez.
Environmental and Social Benefits
The incorporation of biomass into the urban energy system has allowed for:
- Significant reduction of CO₂ emissions, improving air quality.
- Energy modernization of municipal buildings.
- Educational exemplarity, by turning schools into spaces that convey sustainability values to new generations.
This model is especially relevant in an international context marked by the volatility of fossil fuel prices, reinforcing the importance of opting for local and renewable resources.

The Heat Network: Technical Credibility
Official certificates objectively certify the excellent energy performance of the buildings connected to the system. Compared to individual thermal solutions, the urban Heat Network offers key advantages:
- Greater operational and economic stability, by detaching the thermal cost from the volatility of the electricity market.
- Optimization of large-scale thermal production, with superior energy performance.
- Compliance with European guidelines on efficiency and decarbonization of the building stock.
Furthermore, it avoids the need for structural reforms in each building, as energy supply is carried out integrally from a centralized infrastructure.
A Replicable Model
The experience of Guadalajara demonstrates that sustainability can become an effective and measurable public policy. By acting on educational centers, the city council not only improves energy efficiency but also generates a cultural and pedagogical impact: schools are transformed into living laboratories of climate action, where students learn the importance of the energy transition.
This model, based on biomass from sustainable forest management, aligns with European regulations and can be replicated in other cities seeking to reduce emissions and modernize their public infrastructure.
The achievement of the energy rating A in all public schools of Guadalajara marks a milestone in local energy management. The commitment to biomass and urban heat networks reinforces the technical credibility of the model and positions the city as a reference in the transition towards a cleaner, more efficient, and resilient future.



