What's Ferrara's green secret? It's underground, where a geothermal basin feeds its district heating system. The result? 87% of the thermal energy distributed in the city is "clean" and we avoid about 22 thousand tonnes of CO 2 emissions.
A treasure is hiding under the soil of Ferrara. Not a chest full of gold coins nor a vault containing hidden works of art. It is a gift that nature gave this city. About two thousand metres under the Casaglia hamlet, there is a geothermal deposit from which water is drawn at around 100 °C. It is one of the world' s largest geothermal sources and a completely clean and renewable source of energy.
This natural treasure makes Ferrara's district heating one of the most advanced geothermal plants in Europe. This reservoir, in fact, supplies 43% of the thermal energy to a 160 km long network that serves about 25 thousand housing units. Thanks to geothermal energy, combined with the recovery of the heat generated by the Via Diana waste-to-energy plant, 87% of the heat we distribute in Ferrara is "green". This result is confirmed by the recent Carbon Footprint certification validated by SGS, according to which Hera district heating helps the city of Ferrara to save 22 thousand tonnes of CO2 emissions per year.
The Hera Group, partnered with Enel Green Power in a specially created temporary grouping of companies, has been managing this treasure trove of clean energy since the end of 2019. We began this process in 2017, when we obtained the concession to exploit the geothermal reservoir in the Ferrara subsoil, and we recently completed it by acquiring the Casaglia geothermal power plant. Thanks to this operation, we expect to increase the Ferrara district heating system's use of geothermal energy by a further 23% by 2023, compared to the 2016-2019 average.
In recent years, our strategy has had a single objective: to boost district heating in the city and create an advantage in both the residential and production markets. For example, under an agreement with the Municipality of Ferrara, customers who convert their systems, installing a district heating controller, already receive an 80% discount on the installation.
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