Fondón shows how former coal infrastructure can become part of a clean energy future. In Asturias, HUNOSA uses geothermal energy from old mine water combined with biomass to provide reliable heating, while supporting innovation, lower emissions and the regeneration of local communities.

Tallinn is making district heating cleaner and more efficient with a new 24 MW heat pump that recovers waste heat from biomass production. The system cuts natural gas use by 13.5 million m³ and reduces CO₂ emissions by around 20,000 tonnes every year.

Tabreed is pioneering India’s first Cooling as a Service model for commercial real estate, delivering efficient district cooling through a long-term, performance-based system. Designed to cut energy use, emissions and grid pressure, it offers a scalable blueprint for sustainable cooling across rapidly growing Indian cities.

Brescia is turning its district heating network into a low-carbon energy system by combining industrial waste heat, heat pumps, thermal storage and renewables. Since 2016, these upgrades have helped cut CO₂ emissions by 73%, while coal was completely phased out in 2020.

The Well in Toronto features an 8-million-litre thermal energy storage system that stores energy when demand is low and releases it when the grid is under pressure. Combined with Deep Lake Water Cooling and low-carbon heating, it delivers efficient, resilient heating and cooling for the surrounding community.

Kankaanpää has transformed its district heating network into a smart, low-carbon energy system. By combining a digital twin, the world’s first sand battery, waste heat recovery and advanced heat storage, Vatajankoski achieved a 72% reduction in carbon emissions while maintaining outstanding reliability. A pioneering project shaping the future of district heating.

Markham’s district energy system combines exceptional reliability with low-carbon innovation. Serving over 15.4 million sq. ft. with 99.9992% reliability, it is now accelerating its transition with major heat pump investments, including the world’s largest Wastewater Energy Transfer plant.

Pornainen is taking clean heating to the next level with a 1 MW Sand Battery capable of storing 100 MWh of thermal energy. Around ten times larger than the Kankaanpää system, it reduces CO₂ emissions, adds flexibility to district heating and even reuses industrial by-products — a major step toward scalable, circular energy storage.

WarmteStad is transforming Groningen’s heating system with a smart, affordable and sustainable district heating network. Powered by waste heat, solar thermal energy and seasonal storage, it already delivers 60% renewable heat and aims for 100% by 2035. A people-first model for a cleaner and fairer energy future.