Certificate, Spain
In San Sebastian de los Reyes in the heart of Spain, a building with 56 homes is heated
and cooled by just three heat pumps.
Why is it a unique project? What innovation does it implement in terms of technology, design, services or other aspects?
This building is a sustainable construction both in its design, execution and final phase, obtaining the highest level of energy rating. Not only does it have a geothermal system with water-water heat pumps operating in cascade, but it also has an underfloor heating-cooling system, special attention to thermal insulation and a double-flow ventilation system with heat recovery.
What is the replicability potential of this project?
The replicability of the project is wide, it is applicable to any type of residential building. This technology not only makes it possible to comply with existing building regulations and satisfy European Directives, but also enables a seal of sustainability to be obtained that provides visibility, recognition and the capacity to become a guide for buildings to be constructed in the future.
Lessons learned
- Savings compared to conventional gas boiler and aerothermal installation of 36%. This represents 32,600e per year.
- SPF July 2023 = 6,7
- SPF Annual = 5,3
Key Facts
| Building | Heat pump and source | ||
| Location | Madrid, Spain | Number of HP | 3 |
| Construction | 2019 | Operation mode | cascade |
| Project type | newly built | Heat source | ground |
| Heat and cooling distribution | underfloor | Services | Heating & active cooling, DHW |
| Heated space | 6,700m² | Type of system | central |
| No. of apartments | 56 | ||
| Level of insulation | excellent | ||
| Space Heating, DHW and Cooling | Other information | ||
| Installed power | 300 kW | Coefficient of Performance | 4,6 – 5 |
| Heating temperature | – | Refrigerant | R410A |
| DHW temperature | – | Boreholes | 32 x 125m |
Description of technical concept
The residential building, designed by theprestigious architectural firm Morph Estudio and promoted by AEDAS Homes, has a heating and
cooling system that consists of a collection system of 32 boreholes of 125 meters deep each and a production system composed of three
Ecoforest heat pumps model HP3 25-100 kW that aim to cover 100% of the heating, cooling and DHW demands. Heat pump source collection and installation were executed by the installer Geoter.
This is a unique project as geothermal energy in the renewable energy that is responsible for covering 100% of the building’s thermal demand, thus obtaining one of the highest levels of sustainability of the BREEAM seal.
The Seasonal Performance Factor (SPF) of 6,7 is a milestone in the energy efficiency of a centralized residential installation of this size.
Case study delivered by: Ecoforest