Comparative methodology framework
Article 3
1. When calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements, Member States shall apply the comparative methodology framework laid down in Annex I. 2. Member States shall use the comparative methodology framework to compare the following measures, based on the primary energy and emission performance and the cost attributed to their implementation: (a) energy efficiency measures; (b) measures incorporating renewable energy sources; (c) packages and variants of such measures. 3. For the purpose of the calculation referred to in paragraph 1, Member States: (a) shall establish the year in which the calculation is being performed as the starting year for the calculation; (b) shall use the calculation period set out in Annex I; (c) shall use the cost categories set out in Annex I; (d) are recommended to use the projected carbon price trajectories, set out in Annex II, for carbon costing. 4. For the purposes of the calculation referred to in paragraph 1, Member States shall complement the comparative methodology framework by determining all of the following: (a) the estimated economic life cycle of buildings and building elements; (b) the discount rate; (c) the costs for energy carriers, products and systems, the maintenance costs, the operational costs and the labour costs; (d) the forward-looking renewable and non-renewable primary energy factors or weighting factors in accordance with Annex I to Directive (EU) 2024/1275 and the greenhouse gas emission factors; (e) the estimated energy price developments for all energy carriers, taking into account the information set out in Annex II to this Regulation; (f) the air pollutant emission factors, specifically those for PM 2,5 and NO x . 5. Member States shall endeavour to calculate and adopt cost-optimal levels of minimum energy performance requirements in relation to those building categories where there are no set specific minimum energy performance requirements. 6. Member States shall carry out an analysis to determine the sensitivity of the outcome of the calculation to changes in the applied parameters, covering at least the impact of different energy price developments and the discount rates for the macroeconomic and financial perspectives referred to in Article 4(1) and ideally also to changes in other parameters that are expected to have a significant impact on the outcome of the calculations, such as price developments other than for energy.