3E conceives and designs passive and very low-energy buildings and urban areas by reducing energy demand, and optimising the use of renewable energy sources and the efficient use of conventional energy supplies. Advanced methodologies and simulation tools allow for a full optimisation and rational decision-making process based on economic, environmental and comfort boundary criteria. Involvement in the project execution phase and operational monitoring ensure successful implementation. 3E is adept at establishing a value chain encompassing technology producers and suppliers, installers and certification & quality procedures. Innovative concepts and technologies play a major role in 3E’s new developments.

Clients include public and private investors, who are guided to realise energy efficient new buildings and renovation works for individual and collective housing, offices, shopping malls, sport centres, hospitals, workshops and others, integrated in their specific urban environment.

Check our detailed references for more information about some of our specific projects!

3E Projects in the Health Care Sector

Design of a reliable 100% renewable energy  Polar Station on Antarctica for the International Polar Foundation. Use of passive house techniques to reduce the heat demand, application of wind energy and photovoltaics to supply electricity, and solar-thermal collectors to melt ice to produce fresh water.

Assistance to a construction team of a 60.000 m² shopping mall to optimise building physics and research suitable energy concepts, integrate renewable energy sources in an economical way, set up and validate the building’s energy certificate  (simulations and operational monitoring).

Realisation of an energy audit of a 27.000 m² office building. Identified improvement measures allow for energy savings of 30%, or a total of 64.000 Euro per year (required investment of 35000 euros). Primary energy saving is 2.65 GWh/year, or a reduction of CO₂ emissions of 600 tonnes/year.

Design of a 1000 m² passive (energy consumption for heating 14 kWh/m²) multi-purpose building for the Belgian Flemish government. Dynamic simulations, day lighting study, improvement measures of the building physics with energy consumption, investment & operational costs and comfort parameters.

Pareto analysis of the impact, from a technical, economic and ecologic view, of several investments to foster energy savings for the residential and tertiary sectors of the Brussels-Capital Region. Both the architectural concept of the building and the technical installations are considered.

Renovation of buildings from Montrose Wine Castle Estate in France into a positive energy site, fully based on renewable resources. Development of a sustainable energy concept including energy saving measures with optimised comfort and the use of solar heating and cooling, geothermal, wind and biomass technologies.

Energy concept for the renovation of a 120-year-old "maison de maître" in the European Headquarters of Brussels. Showcase of 100% renewable energy heating and cooling (biomass, solar thermal heating and cooling, geothermal heating and cooling system, photovoltaics) and energy saving measures.

Energy concept and design of a sustainable social housing demonstration project including optimised building physics and ventilation, photovoltaic and thermal solar systems, collective asphalt collector. 70% of the total heat demand of the 13 houses is met using solar energy.

Optimisation of the energy concept of a residential building integrated in a new urban district in China, considering local standards, users profile and pricing of technical installations. Demonstrates the large energy and CO² emission saving potential for new constructions. Co-financied by the Flemish Administration.

Guidance of the development trajectory of an office block with high energy performance. Assistance to the developer and architect to make objective choices with regard to energy savings and investment, provide the energy certificate required for the permit, and monitor the actual performance in operation.