Hilton – Double Tree – Rogier Hilton – Brussels – Main Square Heating renovation Avery Denison – Soignie Ventilation renovation and industrial hall development Iwan Simonis Energy audit References: Belgian National Orchestra Ventilation renovation Municipality of Orvault, Loire-Atlantique Optimisation Ecotropy Montblanc business park, Toulouse Dynova simulation Empereur Air-conditioning renovationVentilation renovation South Express Heating renovation Ceria Energy audit