Energy efficiency is an issue that is gaining importance worldwide due to the role it plays in the areas of resource conservation, providing access to energy for all - especially in developing countries - and combating climate change. The potential for improving energy efficiency remains largely untapped, particularly in developing and emerging countries. The reasons and barriers are diverse, stemming from the policy environment (e.g. focus on rapid economic growth), the energy sector itself (e.g. low energy prices), socio-cultural aspects, financing problems and a lack of information and know-how.