EEI may refer to:
*
Earth's energy imbalance
Earth's energy budget (or Earth's energy balance) is the balance between the energy that Earth receives from the Sun and the energy the Earth loses back into outer space. Smaller energy sources, such as Earth's internal heat, are taken into con ...
, the difference between energy arriving at and leaving Earth
*
Edison Electric Institute
The Edison Electric Institute (EEI) is an association that represents all U.S. investor-owned electric companies.
In its official communications, EEI mostly cast doubt on climate change in the 1990s. In the 2000s, EEI no longer cast doubt on clim ...
, an organisation representing parts of the U.S. electric power industry
*
Eindhoven Energy Institute, a department of the Eindhoven University
*
Electrical and Electronics Institute of Thailand, a not-for-profit entity under the Foundation for Industrial Development
*
Energy efficiency index
Energy () is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy sta ...
, a rating of energy performance compared to a predefined reference used for heating and cooling such as buildings and refrigeration appliances.
*
Epoch of Extreme Inundations, a hypothetical epoch during which four landforms in the Pontic–Caspian steppe were widely inundated
*
Essential elements of information, any critical intelligence information required by intelligence consumers to perform their mission (a term used by US and UK ministries of defence and, until 2014, the US Army)
*
Etosha Ecological Institute, an organisation managing research activity in the Etosha National Park in Namibia
{{Disambiguation