Torre EFISA (A Coruña, Spain) is a 1974 complex of seven connected towers, 6 to 20 storeys high, with 181 homes and 72 shops, built on the site of the first Estrella Galicia brewery. Heating and hot water came from central gas boilers dating from 1997–1999 (2 × 1,581 kW plus 233 kW), with no individual metering.
The goal was to decarbonise heat while the building stayed fully occupied, without replacing the radiators in 181 homes. The solution is a heat-pump-first hybrid plant: two 85 kW Ecoforest ecoGEO+ HP inverter heat pumps, Galician-made, working as air-source units, supply the existing radiators at up to 60 °C, while two 610 kW condensing gas boilers remain only for peaks and back-up. A 20,000-litre buffer acts as a thermal battery charged by a dedicated 35 kWp PV array, plus 99 kWp of shared PV (100 modules + 152 Onyx BIPV panels); three substations replace the old risers, and wired M-Bus meters bill every home for the heat and hot water it actually uses.
The heat pump retrofit alone halved final energy use in its first full year. Combined with the envelope renovation, non-renewable primary energy falls by 84.7% and the EPC improved from E to A.
https://ecoforest.com/es/proyectos/torre-efisa-innovacion-geotermica-en-el-corazon-de-a-coruna/
https://www.agalegaaudio.gal/videos/detail/219100-galicia-por-diante-videopodcast-14-02-2025
