The GREENFLOOR ventilated concrete slab: a new-generation HVAC system
The Greenfloor solution deployed by Vinci Energies’ subsidiary I.C. Entreprise reduces the amount of energy used to regulate the temperature of buildings.
REHASKEEN®, an innovative industrialization product for the massification of energy renovation
Simple, economical, fast and durable, REHASKEEN® makes it possible to industrialise and accelerate the renovation of energy-intensive buildings. In addition, our prefabricated facades are specially designed to meet the fire standards of collective housing and establishments open to the public, thus enabling the thermal renovation of high-rise buildings.
Main project's drivers for reducing the greenhouse gas (GHG) emissions
Energy and resource efficiency
Energy Decarbonisation
Energy efficiency improvements
Improving efficiency in non-energy resources
Emission removal
Financing low-carbon issuers or disinvestment from carbon assets
Reduction of other greenhouse gases emission
Project objectives
Massifying thermal renovations to accelerate the ecological transition
Detailed project description
Large prefabricated panels for external insulation in rehabilitation.
Emission scope(s)
on which the project has a significant impact
Scope 1
Direct emissions generated by the company's activity.
Scope 2
Indirect emissions associated with the company's electricity and heat consumption.
Scope 3
Emissions induced (upstream or downstream) by the company's activities, products and/or services in its value chain.
Emission Removal
Carbon sinks creation, (BECCS, CCU/S, …)
Avoided Emissions
Emissions avoided by the activities, products and/or services in charge of the project, or by the financing of emission reduction projects.
Scope 1 /2/3 : Better energy efficiency. The product has been designed to be completely dismantled (in parts or as a whole) and recyclable.
Quantification : Over the entire life cycle of the product, the associated greenhouse gas emissions (production, transport, installation, end of life) are of the order of 100 tCO2/energy renovation project, i.e. about 25% less than a conventional renovation solution.
Emissions Absorption : Possibility of using bio-based insulation (wood wool).
Avoided Emissions : On average, upgrade from an E to a C energy label depending on the demands of the clients. All performances can be targeted, including passive buildings.
Quantification : Changing the energy label from E to C reduces the emissions of a house by an average of 3 tCO2/year in France.
The environmental impact was calculated using the simplified Life Cycle Assessment methodology established by VINCI and validated by a scientific committee.
According to this method, the emissions associated with the production of the product (materials, design, assembly) are evaluated at 8.7 teCO2; the emissions due to the installation of the product are evaluated at 1.46 teCO2 and at the end of life the materials can be recycled which would bring a benefit evaluated at 0.77 teCO2.
Changing the energy label from E to C allows for an average energy saving of 16,000 kWh/year on a dwelling in France for heating and cooling. With an average emission factor of 188 geCO2/kWh for heating and cooling in France, we obtain avoided emissions of 3 teCO2/year on average for a dwelling.
Key points
Invested amount
2M€
Starting date of the project
01/01/2019
Project localisation
Metropolitan France / Europe
Project maturity level
Prototype laboratory test (TRL 7)
Real life testing (TRL 7-8)
Pre-commercial prototype (TRL 9)
Small-scale implementation
Medium to large scale implementation
Economic profitability of the project (ROI)
Short term (0-3 years)
Middle term (4-10 years)
Long term (> 10 years)
Illustrations of the project
Circular economy
The design of the product, which can be completely dismantled (by elements or in its entirety) and recycled, allows it to be integrated into value chains for the management of the end of the building’s life and for the recycling and reuse of construction waste.
The first Rehaskeen projects are currently being installed. Their design makes it possible to dismantle them and integrate them into the recycling chains, as practiced by the Group’s businesses. At this stage, no product has had to be dismantled and recycled. It is therefore premature to illustrate this example in greater detail, as the first cases of use will come in possibly 20 to 30 years.
The first prefabrication workshop was set up in the Ile de France region. Eventually, a national deployment is planned with a prefabrication workshop in each region. The model can be replicated in Europe.
Contact the company carrying the project
rehaskeen@vinci-construction.fr
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