Recommendations for improvement of energy efficiency
Issuers of certificates indicate on page 4 recommendations regarding cost-efficient measures for energy modernisation of the building insofar as such measures are deemed possible. If no cost-efficient improvements are deemed possible, this shall be explicitly noted. E.g., the latter is regularly the case for new buildings.
Requirements regarding the inclusion of recommendations for cost-efficient modernisation measures in the energy certificate arise from § 20 EnEV. Agreements between the owner and the issuer may not cancel these requirements. The recommendations are intended to inform the owner. However, their realisation is not compulsory.
Responsible preparation and designation of modernisation recommendations in most cases requires that the issuer of the energy certificate has acquired sufficient knowledge about the actual technical condition of the building. The ordinance does not however prescribe an inspection of the building by the issuer. The issuer may base his recommendation, e.g., on plan documents or owner specifications if there is no reason to doubt their reliability.
With recommendations for improvement of certain construction- or system compo-nents, the issuer shall specify whether and to what extent these measures are rec-ommendable as part of a greater modernisation or as individual measures. In both cases, it should be verified whether this work could be combined with other planned repair measures (e.g., plaster renovation, refinishing of the roof or boiler replacement). This has consequences for the assessment of economic advantages.
Qualified consultants and issuers of certificates have the potential to indicate details about the economic efficiency of recommended measures in the certificate itself. It is possible to estimate the amortisation period or the costs per saved kilowatt hour of end energy (equivalent energy price). Thus, building owners can get a picture of whether the recommended measures are advantageous from an economic perspective.
Information regarding the cost effectiveness of frequently realised modernisation measures for residential buildings according to Article 11 section 4 of the European Energy Performance Directive as well as regarding assessment methods and boundary conditions is available under the heading Economics.