Residential retrofit

One of the objectives of City-zen is to share the tools and the knowledge gained throught the project. In this web section, you’ll find the lessons on building retrofitting.

For more results, click here or check our final interactive booklet !

City-zen’s projects

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Residential retrofit in Amsterdam

High level retrofit of residential buildings in Amsterdam to reduce their net energy use. More info

Retrofitting towards zero energy buildings in Grenoble

The city will focus on existing dwellings with the objective to reach the level of current thermal regulation for new buildings : BBC renovation level. Social housing and private multi-family condominiums are an effective lever to reach for 2020 objectives of GHG reduction in Grenoble. More info


Modular insulation panels

Many buildings are being renovated step by step. First the bathroom and maybe next year the kitchen. Financial limitations but also practical reasons are for many people the reason not to do a complete overhaul. So why not work this way when insulating the building? More info

Hybrid heat pump Daikin

Hybrid heat pumps for reduction of use natural gas

Hybrid heat pumps help to reduce the use of natural gas for the heating of residential buildings. More info

Research in performance of ventilation systemsl

Do you like to sleep with the window open to let in some fresh air? Many people do. However, if you want to control your energy bill, keeping the heat inside is obviously a better option. As our homes and buildings are increasingly insulated and airtightness is improved, is opening a window still the best option for ventilating a room? And what about the air quality indoors after cooking? More info

State of the art

  • The Project

    A city operating entirely on clean energy. In theory, it's possible. But in real life? How to integrate new solutions in existing buildings, systems and people's lives? What are the technical, economic or social barriers? And how to overcome these? That's what we've learned by doing in 20 projects in Grenoble and Amsterdam.

  • Our Activities

  • Achieved Impacts

    • 20 innovations in Grenoble & Amsterdam
    • 35,000 tonnes CO2 saved per year
    • 76,000 m² renovated residential buildings
    • 10,000 dwellings connected to a Smart Grid