2.1 Informational Deficits and Cognitive Barriers in Existing Housing
The integration of existing residential building stock into district heating networks depends heavily on resolving both socio-cognitive hesitations and technical envelope constraints. Applying behavioural frameworks to residential energy transitions demonstrates that end-user acceptance is not merely a function of technological availability, but rather of user capability, opportunity, and motivation (COM-B Investigation, 2025). Within existing housing contexts, residents frequently exhibit poor foundational knowledge and understanding regarding district heating operations, which amplifies perceived financial and operational risks (COM-B Investigation, 2025). Such cognitive barriers suppress the voluntary intention to connect, demonstrating that informational deficits directly impede infrastructural deployment. Concurrently, technical feasibility remains intrinsically coupled to the physical thermal characteristics of the existing building stock. Multi-family housing typologies across Europe require structured intervention packages that align domestic heating and cooling adaptations with national envelope efficiency requirements (H2020 BuildHeat, 2020). Without standardised retrofit protocols that systematically address thermal insulation and internal distribution systems, technical inefficiencies exacerbate resident skepticism regarding heating efficacy and operational expenditures. Therefore, socio-technical analysis reveals that informational interventions alone cannot drive network adoption if detached from standardised physical retrofit solutions (H2020 BuildHeat, 2020). Implementing targeted community involvement initiatives facilitates active local engagement, alleviates informational resistance, and clarifies perceived cost structures, thereby shifting individual motivation toward network connectivity (COM-B Investigation, 2025). Ultimately, overcoming connection barriers in existing residential housing stocks necessitates synchronising structured community-level communication strategies with robust, standardised building envelope modernisations.