1. EU 20-20-20 Targets. Available online: http://ec.europa.eu/clima/policies/package/index_en.htm September 2012.
2. Energy Performance of Buildings;Directive 2010/31/EU of the European Parliament and of the Council,2010
3. Promotion of the use of energy from renewable sources;Directive 2009/28/EC of the European Parliament and of the Council,2009
4. Heat pumps – a renewable energy technology?;Nowak;REHEV Journal,2011
5. Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 2: Test conditions;EN 14511-2,2007