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"Positive energy", what is it?

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In recent years and the Grenelle de l'Environnement in 2007, many neologisms and expressions have flourished on the theme of sustainable development, such as "positive energy", even if the concepts already existed before. “Ecological works”, “ecomaterials”, “carbon borrowing”… So many terms to underline the (late) good intentions in favor of saving the climate and the planet.

"Positive energy", what is it?

"Positive energy" is by definition for a habitat the fact of producing more energy than what is consumed. This result mainly involves two levers. The first is to eliminate or limit heat loss, which in the case of concrete houses is the main culprit in energy waste - and heavy heating bills. The second is to capture natural energies (rainwater), and / or produce them (photovoltaic panels, groundwater heat pump, etc.).

Towards “eco-districts” ensuring their own energy consumption?

The interests of acquiring a "positive house" are numerous, and obvious. Once the amortization of the work has been acquired, the habitat is in a situation of self-consumption, independent (or in part) of conventional fossil fuels, which emit greenhouse gases. The habitat's carbon footprint then becomes zero, or very small. From an economic point of view, it is a double deal for buyers, with reduced or eliminated energy bills, or even the possibility of selling the excess energy produced to EDF.


While positive energy buildings are on the increase in France, an innovation took place in Lyon on September 17, with the inauguration of the Hikari island ("light" in Japanese). This work by architect Kengo Kuma covers 12,800 m², including shops, offices and residential apartments. Intended to develop until 2020, this “eco-district” is a first in Europe in terms of positive energy.

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