Best Geothermal Installation 2009 Best Energy Efficiency Performance | Association of Energy Efficiency Companies Best Energy Installation in Tertiary Sector Buildings 2009 Comprehensive restructuring of the office building. Construction of a semi-automated underground car park. Renovation of facilities with geothermal HVAC installation (thermo-activation of piles and vertical heat exchangers). Rooftop thermodynamic panels capturing diffuse radiation for pre-treatment of ventilation air. Manage services Manage suppliers