In 2024, F’in Common signed a 2,100,000 euro credit agreement with ULB to finance three energy renovations on its Brussels campuses. The convention took effect in January 2025, with disbursement three months later. In 2026 and 2027 ULB repays a fixed 1/23rd of the total per year; from 2028 onwards, the annual repayment tracks the actual savings on its energy bills across the three sites.

Building H (Solbosch). Full window-frame replacement across the 1,440 m2 building. Works in 2024, reception in March 2025. Expected savings: about 300 MWh of gas and 60 tonnes of CO2 per year. Measured 2025 vs the 2023 baseline: 328 MWh and 64 tonnes, ahead of target.

Building BC (Plaine). Full window-frame replacement across the 1,568 m2 building. Works from June 2024 to April 2025, reception in April 2025. Expected savings: about 500 MWh of gas and 100 tonnes of CO2 per year; the first measured year (347 MWh, 68 tonnes) is below target, with a full post-reception year still needed for a fair comparison.

Heat network and boiler room (Solbosch). The deepest intervention: hydraulic adaptation of the primary network, deep retrofit of the distribution side for variable-flow operation, modernised boilers with a flue condenser, and a heat pump maximising low-temperature recovery from cogeneration. Expected savings: about 2,400 MWh of gas plus 350 MWh of electricity per year, avoiding 550 tonnes of CO2. Measured 2025 vs 2023: 2,468 MWh of gas, 486 MWh of electricity, and 676 tonnes avoided, ahead of target.