Brussels Environment :

Search for grants and subsidies. Heating, air-conditioning, ventilation and building energy performance (PEB) regulations. In the Brussels-Capital Region.

http://www.bruxellesenvironnement.be/

Energy portal in Wallonia

Energy grants, subsidies and regulations.
Walloon Region

http://energie.wallonie.be/

Energy factor 4

Heat pumps, thermal and photovoltaic solar panels. Operation, installations, financial assistance, etc.

http://www.ef4.be/

Simulation and comparison of specific energy consumption in the tertiary sector

A Web tool to achieve a broader view of your energy consumption and compare it with the other builgins in the same sector

http://www.icedd.be/ct/