Renovation of 14 school buildings in the Province of Liège (RenoWatt)


Optimisation of the building envelope

Upgrading of the lighting

Installation of solar panels

Building monitoring and remote control

Guarantee of energy performance for 15 years


50% less CO₂ emissions

As part of the RenoWatt project, through which the Walloon government aims to improve the energy efficiency of public buildings, we carried out a first series of renovation projects in 14 educational institutions in the province of Liège, in the form of energy performance contracts. The project concerned institutions from the city of Seraing, the municipality of Oupeye and the province of Liège.

In total, we insulated more than 10,000 m² of roofs and 5,000 m² of facades and replaced approximately 8,000 m² of windows. In addition, we renovated boiler rooms, modernised lighting and installed solar panels. The works started in 2018 and have meanwhile been completed.

In addition, we take care of the management and maintenance of the installations for 15 years, as well as the promised savings. The installations are monitored remotely so that energy losses can be detected quickly. In this way, we are helping the schools in Liège to save energy. The results achieved in 2019 and 2020 are very promising for the years to come and exceed the forecasts.

These results are already visible at the Ecole Polytechnique in Huy, where the renovation of five boiler rooms and the insulation of the building envelope have led to a saving of 21% in electricity consumption and 55% in gas consumption, which represents a reduction of 380 tonnes of CO2 emissions. Or at the Provincial Institute for Secondary Education of Hesbaye in Waremme, where we carried out similar renovations, complemented by the installation of solar panels and relighting. These modifications resulted in a total energy saving of 32% and a reduction of 190 tonnes of CO2, but also in greater comfort for teachers and pupils.

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