EU Taxonomy in district heating: documenting compliance with criteria for Activity 4.15

Abstract

The aim of this article is to present a practical approach to applying the EU Taxonomy using activity 4.15 “District heating/cooling distribution” as an example across the entire investment life cycle, from the conceptual phase and preparation of financing applications, through design and implementation, to operation and reporting. Based on an analysis of key legal acts, in particular Regulation (EU) 2020/852 and Commission Delegated Regulation (EU) 2021/2139, the paper identifies the requirements for demonstrating a substantial contribution to an environmental objective, compliance with the “do no significant harm” (DNSH) principle with respect to the remaining objectives, and adherence to minimum safeguards. It then proposes examples of evidence and documentation that may be used to verify compliance with EU Taxonomy criteria at successive stages of the investment process. Particular attention is given to the definition of an “efficient district heating and cooling system” under the Energy Efficiency Directive (EED), which constitutes a key eligibility condition for activity 4.15. The paper demonstrates that documenting compliance with the EU Taxonomy is relevant not only for reporting purposes but also has growing investment and financial significance, as it increasingly affects project bankability and access to financing. The study is primarily addressed to energy companies implementing investments qualifying as activity 4.15, while the proposed approach may also serve as a reference for other energy activities covered by the EU Taxonomy due to the horizontal nature of certain documentation requirements. It is further argued that taxonomy documentation should be understood not merely as a formal compliance obligation, but as a tool supporting risk management and informed investment decision-making.