Energy efficiency in apartment buildings : A study in how energy consumption in apartment buildings have changed in recent years

Abstract: This report covers the development in energy efficiency regarding apartment buildings inSweden. The purpose was to investigate the energy efficiency measures done in the last 20 years. The chosen subjects were heat supply, domestic hot water, insulation, windows and ventilation. Each subject was thoroughly investigated. Regulations were compared to measures taken. The chosen subjects have been examined regarding energy efficiency. However, the largerchanges in each area happened as a result of the oil crisis in the 1970’s. The measures done inthe last 20 years mainly focuses on the behaviour of the resident. Energy efficiency in the futuremainly focuses on technology to help the user save energy without changing their behaviour. There are further technical development opportunities regarding heat supply.