Odyssee energy efficiency index (ODEX) (EU-27)
For each end-use, the following indicators are considered to measure efficiency progress:
- Heating: unit consumption per m2 at normal climate (toe/m2)
- Water heating: unit consumption per dwelling with water heating
- Cooking: unit consumption per dwelling
- Large electrical appliances: specific electricity consumption, in kWh/year /appliance
The variation of the weighted index of the unit consumption between t-1 and t is defined as follows: see formula
The value at year t can be derived from the value at the previous year by reversing the calculation:
It /It -1= 1/( It -1/It),
ODEX is set at 100 for a reference year and successive values are then derived for each year t by the value of ODEX at year t-1 multiplied by It /It -1.
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe's environment.
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