The result “Design and development of the digital urban energy planning and mapping tool” features …

The tool addresses the need for a practical and evidence-based solution to support urban energy planning in complex districts, especially where climate resilience, decarbonisation, and heritage protection must be considered together. Urban planners and public authorities often lack integrated tools able to simulate building and district energy demand, compare alternative supply strategies, and assess the impact of interventions under real local constraints. In MULTICLIMACT, this need was particularly relevant for areas such as the Riga Central Market, where protected historical buildings, existing district heating infrastructure, and the need for more resilient and low-carbon energy systems had to be analysed within the same planning environment. The enhanced PLANHEAT tool responds to this challenge by combining urban energy mapping, scenario analysis, and KPI-based evaluation in a single digital environment.

The tool is based on PLANHEAT, an open-source GIS-based desktop application implemented as a QGIS plug-in for urban energy planning. Its scope is to support the analysis of heating, cooling, domestic hot water, electricity demand, renewable energy potential, and future decarbonisation scenarios at both building and district scale. In MULTICLIMACT, the tool was enhanced with two main new functionalities: (i) the calculation of electricity consumption for lighting and equipment, based on building use, floor area, and occupancy profiles; and (ii) the possibility to model historical/cultural heritage buildings, through dedicated thermal parameters, usage assumptions, and inference rules suited to protected building typologies. The tool includes demand mapping functions, supply potential assessment, scenario configuration, technology assignment, KPI calculation, and comparison of baseline and future options from energy, environmental, and economic perspectives. It was applied and validated on the Riga Central Market district, where different energy planning scenarios were simulated to assess efficiency improvements, renewable integration, and emissions reduction.

The tool is based on the existing open-source PLANHEAT environment and, within MULTICLIMACT, it has been further developed and tested in the project context. At this stage, the enhanced version is mainly available within the project activities and for demonstration purposes. A possible next step to make it accessible to others would be to share the updated version together with a short description of the new functionalities and of the main use cases addressed in the project.

The main user groups are public authorities, urban planners, municipalities, energy agencies, energy consultants, and decision-makers involved in local energy transition and climate adaptation planning. The tool is particularly useful for stakeholders working on district-scale renovation, district heating decarbonisation, renewable integration, and planning in areas with cultural heritage constraints. It can also support technical experts and researchers who need to evaluate alternative urban energy strategies through simulation and KPI-based comparison.

The tool helps future users make more informed and robust planning decisions by translating local building and district data into actionable energy scenarios. It supports the identification of high-demand areas, the evaluation of technology mixes, the estimation of electricity and thermal loads, and the comparison of decarbonisation strategies in terms of primary energy consumption, renewable share, CO₂ emissions, and operational costs. The added capability to model electricity demand gives users a more complete picture of building energy performance, while the new historical building category makes the tool usable in urban contexts where standard assumptions are not sufficient. This is particularly important for municipalities that need to plan interventions compatible with heritage preservation while still pursuing climate-neutral and resilient urban development pathways.

The enhanced tool was tested in the Latvian demo site, with application to the Riga Central Market and validation on the Dairy Pavilion, a cultural heritage building. The new modelling assumptions were checked by comparing PLANHEAT simulation outputs with available energy audit data, showing good alignment and confirming the reliability of the implemented functionalities. After this validation step, the tool was used to simulate district-level baseline and future scenarios, including improved heating efficiency, biomass-based district heating, and solar thermal integration. This real-case application demonstrated that the tool can support strategic planning in a protected urban context and provide useful evidence for local decision-making. Feedback from the demo context is positive in terms of relevance and applicability, especially because the tool made it possible to analyse heritage-compatible energy solutions and district-scale decarbonisation options in a single framework.