Mainly gas and electricity…
In 2015, households in the European Union (EU) accounted for a quarter of the total final energy consumption. Most of their energy consumption was covered by natural gas (35.6%) and electricity (25.0%). Renewables counted for 15.7%, petroleum products for 12.7% and derived heat for 7.8%, while a small proportion (3.3%) was still covered by solid fuels.
The picture varies across the EU Member States. Gas accounted for more than half of the final consumption energy of households in the United Kingdom, Hungary, Slovakia and Italy, while in Malta and Sweden a similar share was made by electricity. Renewable energies (mostly solid biofuels) made up over 40% of the households' final energy consumption in Croatia, Slovenia, Estonia, Latvia and Romania.
... and essentially for heating purposes
As is to be expected, households mainly used energy for heating their homes: this represented around two-thirds (64.7%) of their final energy consumption. In addition, the energy used for water heating accounted for 13.9%, meaning that overall, the heating of space and water accounted for 78.6% of the final energy consumed by households. Energy used for lighting and the use of most electrical appliances accounted for 13.8% of the energy used by households, while the main cooking appliances represented 5.7%, air conditioning 0.5% and other end-uses 1.5%.
For more information
Eurostat website section dedicated to energy statistics