District Heating Market to Exhibit A CAGR of 4.11% from 2019 to 2026; Rising Energy Demand Around the World will Boost Growth. Top Players in District Heating Market are NRG Energy, Fortum, Engie, Vattenfall, Alfa Laval, Korea District Heating Corporation, Radet, Danfoss, Metropolitan, SSE Enterprise, Veolia, Statkraft, Goteborg Energi, Dortmund cogeneration plant (RWE AG) and Keppel DHCS.