Heat pump, roof insulation ... what are the most effective works to reduce CO2 emissions

On the occasion of COP 26, Effy, a specialist in energy renovation in France, measures the carbon emissions avoided thanks to energy renovation work. These results are taken from an in-depth study on the group's carbon footprint, carried out with Sami, a specialist in carbon accounting, and published shortly.

This study reveals that, while all the energy renovation works lead to a reduction in CO2 emissions, the installation of a heat pump to replace a polluting heating system and the insulation of the attic in heated homes. fossil fuels are the most ecologically efficient.

Frédéric Utzmann, President of Effy: “The energy renovation of housing is today an essential lever to achieve the objective of reducing greenhouse gas emissions by 40% by 2030. We know that poorly performing housing, in particular sieves thermal, are the source of a large amount of carbon emissions. These emissions can be easily and significantly reduced thanks to energy renovation work such as the replacement of a polluting heating system or even the insulation of the attic in homes heated with fossil fuels. "

Replacement work for a polluting heating system: the n ° 1 heat pump to reduce carbon emissions

Among the replacement sites for a polluting heating system, it is the installation of a heat pump that makes it possible to reduce CO2 emissions most effectively.

In particular, the installation of a heat pump to replace an oil boiler leads to the greatest reduction in emissions: 65 tCO2eq avoided over 17 years (estimated life of heating equipment). Replacing an oil boiler with a condensing boiler makes it possible to avoid 38.

Insulation work: attic insulation is the most efficient way to reduce your carbon footprint

In an uninsulated house, roof insulation work is the most effective in reducing carbon emissions, followed by insulation of walls, windows and floors.

In the case of a home heated with fuel oil, for example, the insulation of the attic avoids 108 tonnes of CO2 equivalent (tCO2eq) over 50 years (life of the insulation). The insulation of the walls makes it possible to avoid 97, the insulation of the windows 39 and the insulation of the floors 24. The insulation work of the attic which targets homes heated with natural gas or fuel oil generates the greatest quantities of energy. emissions avoided.