DIN SPEC 4701-10/A1:2012-07

The primary energy demand of the systems considered in DIN V 4701-10 is composed of shares of renewable and non-renewable resources. For purposes of simplification, DIN V 4701-10:2003-08 gives the entire primary energy factor as the sum of both shares for all energy carriers (except wood). In the course of the EnEV 2007 (German Energy Saving Regulation of 24th July 2007) and the subsequent EnEV revisions, primary energetic evaluations for all energy carriers refer to the non-renewable share. Some modifications of DIN V 4701-10 are necessary; these have been collected in the following. This allows calculation of the entire primary energy demand and the non-renewable share of the primary energy demand. A technically significant modification results for the non-renewable share of the electricity mix. Above all, as a result of the increasing use of renewable energy sources, the primary energy factor for the non-renewable share is now 2,4. Furthermore, primary energy factors for biogas and biooil as well as a calculation formula for mixes from biogenic and fossil fuels are supplemented. Equivalent changes have been made in DIN V 18599:2011-12 so that the procedure in DIN V 4701-10 still corresponds with the procedure in DIN V 18599 (all parts). This document (DIN SPEC 4701-10/A1) has been prepared by Working Committee NA 041-05-01 AA "Energetische Bewertung raumlufttechnischer Anlagen" ("Energy performance of heating and ventilation systems in buildings") of the Heating and Ventilation Technology Standards Committee (NHRS).