Sets energy performance requirements for new and existing buildings in the instance of major renovation and regulates the issuing and display of energy performance certificates. Specifies that as of January 2016, the primary energy consumption of new-builds will have to be reduced by an additional 25%. Requires decommissioning of oil and gas boilers that provide central heating in apartment buildings that were installed before January 1985 or which have been in service for more than 30 years. Fines for non-compliance have been increased to €50,000. Energy Conservation Ordinance