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Indicator Specification
Energy efficiency and energy consumption are intrinsically linked. Increased energy efficiency can lead to significant reductions in energy consumption provided that measures are in place to discourage the occurrence of rebound effects. Reducing energy consumption in the household sector as a result of energy efficiency progress and behavioural changes can lead to significant reductions in environmental pressures such as greenhouse gas and air pollution emissions.
Household consumption: tons of oil equivalent (TOE)
ODEX index: #
CO2 emissions: MtCO2
No targets have been specified
Energy efficiency indices (ODEX) can be defined as a ratio between the actual energy consumption of the sector in year t and the sum of the implied energy consumption from each underlying sub-sector/ end use in year t (based on the unit consumption of the sub-sector with a moving reference year. The evaluation of energy savings in household is carried out at the level of three end uses (heating, water heating and cooking) and five large appliances (refrigerators, freezers, washing machines, dishwashers and TVs). For each end use, the following indicators are used to measure efficiency progress: heating — unit consumption per m2 per dwelling equivalent to central heating at normal climate; water heating — unit consumption per dwelling with water heating; and cooking — unit consumption per dwelling. The average energy consumption per m2 per dwelling equivalent to central heating is used to leave out the impact of the diffusion of central heating. The effect of (heating) behaviour was estimated by assuming that technical progress cannot be reversed. Odyssee index: see http://www.odyssee-indicators.org
Change in households final energy consumption per person: (final energy consumption per country2007 /population per country2007) / (final energy consumption per country1990 /population per country1990) – 1
Energy consumption by end use per dwelling: final energy consumption per country / number of dwellings per country.
Energy consumption per m2 for space heating : final energy consumption for space heating / (number of dwelling * dwelling size)
Energy consumption per dwelling or m2 at normal climate: sum of heating consumption at normal climate and the non heating consumption/ number of dwellings
Heating consumption per dwelling at normal climate : energy consumption * HDDn/HDD with HDD: observed Heating Degree Days in current year and HDDn number of degree days for a normal year (long-term average degree days over last 30 years; source Eurostat); number of degree days by country population weighted
CO2 emissions space heating per m2, climate corrected: CO2 emissions from space heating per dwelling climate corrected / average floor area of dwellings
Box: Explanation of the calculation of the energy consumption by end use: case of gas used for space heating
• If Eurostat gas consumption of households is X Mtoe for EU-27;
• From the sample of countries for which data are available by end use, the consumption of gas for space heating, YH, is calculated from the sum of countries;
• From the same sample of countries, the total consumption of gas, Y, is calculated from the sum of countries
• The share of space heating in gas consumption SH in the sample of countries is equal to YH/Y
• To get the consumption of gas for space heating (XH) at the EU level we assume that the share is the same as for the sample of countries XH = X* SH
No methodology references available.
No uncertainty has been specified
Not all data is available for all countries. Availability for data on years earlier than 2007, is higher.
Odyssee data is recently updated (August 2009).
The reliability of total household energy consumption and related CO2 emissions is reliable due to trustworthy statistics underlying it. Division of the energy consumption among activities (heating / cooking etc.) is less accurate, because it is based on assumptions.
No uncertainty has been specified
Work specified here requires to be completed within 1 year from now.
Work specified here will require more than 1 year (from now) to be completed.
For references, please go to https://www.eea.europa.eu/data-and-maps/indicators/energy-efficiency-and-energy-consumption-2 or scan the QR code.
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