renewable energy produced
equivalent to the consumption
of 182 thousand families
carbon footprint
for energy production compared
to 2015, aiming at -23% by 2022
tons of greenhouse gas avoided

Primary energy consumption of the Hera Group

Hera’s energy consumption reflects the Group’s multi-business nature.

The balanced portfolio of its businesses creates synergies that increase productivity in multiple sectors while reducing energy consumption. Hera manages cogeneration plants for district heating which produce thermal energy and electricity to sell to its clients, and cogeneration plants, mainly to satisfy internal consumption requirements. It also manages waste-to-energy plants that dispose of waste with subsequent energy recovery, turboexpanders that take advantage of pressure differentials in the natural gas distribution stations in the local managed networks, and the recovery of low enthalpy geothermic heat at the district heating plant in Ferrara. Furthermore, a part of the electricity produced by the Group’s photovoltaic plants is used for self-consumption. Through a continuous series of measures, Hera pursues a policy aimed at increasing the energy efficiency throughout its business.

Primary energy consumption by type
Tep 2016 2017 2018
Energy consumption for production (natural gas, geothermal, biogas, others) 139,068 152,973 204,893
Waste-to-energy treatment 336,590 326,743 320,942
Total energy consumed in electricity or thermal energy production plants 475,658 479,716 525,835
Electricity excluding public lighting 86,462 105,743 109,522
Electricity for public lighting 32,336 31,255 30,947
Natural gas and other energy vectors for heating of premises 2,860 2,962 2,819
Fuel for vehicles 9,971 9,843 9,500
Total energy consumed for uses other than the production of electricity or thermal energy 131,629 149,802 153,177
Total 607,286 629,518 679,012

The data refer to energy consumption by Hera Spa, Acantho, AcegasApsAmga, Aliplast, Aresgas Group, Fea, Hera Comm, Herambiente, Hera Luce, Hera Servizi Energia, Hera Trading, HeraTech, Hestambiente, Inrete Distribuzione Energia, Marche Multiservizi, Marche Multiservizi Falconara, AcegasApsAmga Servizi Energetici, Uniflotte and Waste Recycling.

In 2018, primary energy consumption increased compared to the previous year (+7.8%), due to the inclusion of methane gas consumption of in-service cogeneration plants (30,071 toe), operated by Hera Servizi Energia for its customers and not included in previous years in the scope of reporting. On a like-for-like basis, overall consumption increase by 3.0%. Electricity consumption increase slightly (-1% in public lighting – thanks to the energy efficiency measures implemented – and +3.6% in other consumption).

Energy consumed within the organisation

Thousands of GJ



Fuel consumed from renewable sources

(+) 8,308

(+) 8,440

Fuel consumed from non-renewable sources

(+) 13,235

(+) 14,779

Electricity consumed

(+) 2,661

(+) 2,704

Thermal energy consumed

(+) 886

(+) 876

Electricity produced by photovoltaic

(+) 7

(+) 6

Electricity produced

(-) 4,028

(-) 4,500

Thermal energy produced

(-) 2,229

(-) 2,796




Energy consumption does not include: AcegasApsAmga Servizi Energetici for 2017, ASA Scpa, EnergiaBaseTrieste Srl, Feronia Srl, Hera Comm Marche Srl, Herambiente Servizi Industriali Srl, Tri-Generazione Srl, whose consumption is estimated at 0.5% of total energy consumption.

The organisation’s internal energy consumption, calculated according to the reporting standard used (GRI Sustainability Reporting Standard) were estimated at 19,509 thousand GJ. They are made up of the sum of the consumption of fuel from renewable sources (biogas and waste processed by waste-to-energy plants, for the renewable share 51%) and non-renewable sources (natural gas, diesel fuel, LPG, petrol, and waste processed by waste-to-energy plants, for the non-renewable share 49%), electricity consumption, the production of renewable electricity from photovoltaic plants, and minus the electricity produced and fed into the grid and the thermal energy produced. Primary energy consumption is calculated based on data gathered mainly from measurements and on the basis of calculation and conversion methods defined for the application of the regulatory provisions of Italian Law 10/91 (MISE Circular of 18 December 2014).

The Group’s energy performance can be represented by a number of indicators that express its development and prospective targets and illustrate the company’s savings strategies. A comparison of energy consumption with certain production and operating indicators can provide consumption intensity indices that reflect the improvements achieved by efficiency measures and by corporate energy management.

Intensity indices of primary energy consumption


2017 2018
Purification: primary energy (MWh)/volumes purified (thousands of m3) 587.2 414.8
Drinking water purification: primary energy (MWh)/water fed into the water network (thousands of m3) 462.0 455.0
District heating: primary energy consumption (toe)/thermal energy fed into the network (MWh) 166.4 173.6
Waste-to-energy plants: net energy production (MWheq) / volumes processed (t) 550.1 544.6
Offices: total primary energy consumed (toe) /area of offices (thousands of m2) 26.0 26.5
Vehicles: primary energy (toe)/distance travelled by the vehicles (millions of km) 163.4 144.2
Public lighting: primary energy (kWh)/light points 370.6 336.4
The data concern the energy consumption of Hera Spa, AcegasApsAmga, Fea, Hera Luce, Herambiente, Marche Multiservizi and Uniflotte. The data refer to the consumption of electricity, natural gas, diesel fuel, LPG, petrol and waste. Excluding Marche Multiservizi for vehicles index.

The water sector shows an overall improvement in performance in 2018, with consumption intensity indices decreasing in both purification and making drinking water. However, it should be noted that the purification index is directly influenced by the volumes treated, against energy consumption that by nature of the plants remain substantially stable. The values for 2017 were higher than the historical data due to lower volumes treated as a result of the drought. As far as drinking water is concerned, also in this case consumption in 2017 had increased due to the particularly dry summer, which had made it necessary to use more energy-intensive sources of supply (groundwater).

District heating shows a general worsening of the indicator compared to the previous year, mainly linked to the greater use of thermal power plants to the detriment of cogeneration with electricity.

The vehicle index improved, thanks to the gradual renewal of the fleet. In particular, the index of vehicles used for waste management, prevalent from the point of view of consumption, increased in the 2017-2018 period from 529.5 to 519.2 toe/million km, down 2%, particularly significant on this type of vehicle.

The public lighting index has further improved, as a result of the energy efficiency measures described in the respective paragraph in this Chapter.