Industry and urban residents are the largest consumers and have been benefiting for a long time. National energy efficiency efforts should be directed primarily to those who consume the most electricity and whose potential for savings are the greatest. In an attempt to maximise and accelerate the reduction of the housing backlog, energy efficiency has largely been overlooked in the design and construction process. Principles are now established to correct these errors and ensure that all houses, including the very small ones, comply with the best-practice energy efficiency standards.