A revolutionary innovation emerges in the Drôme, where a retired engineer has just created the most energy-efficient house in France. Without any heating system, it maintains a constant temperature of 23 °C, even when the outside thermometer plunges below the -6 °C.
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A revolutionary innovation emerges in the Drôme, where a retired engineer has just created the most energy-efficient house in France. Without any heating system, it maintains a constant temperature of 23 °C, even when the outside thermometer plunges below the -6 °C.