On Wednesday, March 21st, the European Parliament and the Council published a comparative methodology framework for calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements. The publication sets a deadline of one year from March 21st for member states to submit their first report on cost optimality concerning all input data and assumptions used for those calculations and the results of those calculations.
The calculation methodology shall apply from 9 January 2013 to buildings occupied by public authorities and from 9 July 2013 to other buildings.
The Commission Delegated Regulation (EU) No 244/2012 of 16 January 2012 supplementing Directive 2010/31/EU of the European Parliament and of the Council on the energy performance of buildings was to have been published by June 30, 2011, but suffered delays in trying to get agreement.
A copy of the regulation is available here.
Energy in Demand - Sustainable Energy - Rod Janssen 
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