The ‘green heat’ subsector gathers the following under-sectors:
- Geothermal energy: In Wallonia, we count two production sites of deep geothermal energy: the site of Saint-Ghislain and the site of Douvrain. In 2012, the primary geothermal energy production is estimated at 16.6 GWh of heat (of which 15.8 GWh have been used in the form of useful heat). Let us note, as a warning to others, that the power station of Saint-Ghislain provide with a part of this energy, heat at 355 apartments, three schools, a swimming pool, a hospital, greenhouses and a wastewater treatment plant.
- Heat pumps: The 2020 European objectives aim to a consumption of 30 TWh of renewable energy in the field of heating and air conditioning. The European Heat Pump Association (EHPA) estimates that the heat pumps can contribute to it for 4 TWh, that is to say 12 times the current production (324 GWh in 2013). The ATTB works out national statistics of sales which differentiate the ‘heating’ HP and ‘hot water’ HP ; although more and more of installed HP in Belgium combine the heating and the production of hot water.
- Solar thermal: At the end of 2013, Belgium counted 578,000 m² of solar thermal panels installed. Source: APERE
- Residential biomass: it is estimated in 2013 that the number of accommodations mainly warmed by wood is of 42,860 accommodations (703.1 GWh). In the same way, we consider that the park of the auxiliary heating systems by wood at 362,000 accommodations (2 328,9GWh). The residential warming wood consumption is estimated at 3,064 GWh for 2013. It has increased of 20% between 2012 and 2013 and compared with 1990 consumption has been multiplied by 2.8. Source: Assessment of electric production and transformation, of cogeneration and renewable 2013 (SPW)