4.1 Multi-Criteria Priority Mapping for Building Clusters
Establishing a practical prioritization methodology allows campus facility managers to sequence decarbonization investments across heterogeneous building stocks effectively. Practical retrofit sequencing depends on evaluating existing heating equipment against alternative heat pump configurations. Empirical investigations of educational facilities demonstrate that replacing existing condensing gas boilers with air-source heat pumps serves as a direct and viable intervention for deep campus retrofits targeting institutional climate goals (University of Galway Study, 2024). However, deploying uniform mechanical technology across an entire campus is frequently constrained by distinct architectural footprints, spatial site limitations, and varying thermal demands across building clusters. Therefore, campus planning benefits from screening diverse low-carbon infrastructure options before committing capital. Comprehensive simulation analyses of campus building clusters reveal that distributed ambient loop systems utilizing wastewater-source, hybrid wastewater-source, or ground-source configurations achieve meaningful reductions in annual heating and cooling energy consumption as well as greenhouse gas emissions compared to conventional base cases (T.M.U. Campus Study, 2026). In practice, campus estate planners must apply a multi-tier screening workflow that maps high-density clusters to ambient loop networks while directing standalone educational buildings toward direct air-source replacements. The resulting priority map operationalizes these criteria by ranking assets according to existing boiler replacement urgency, spatial suitability for thermal loops, and regional energy pricing schemas. By embedding these technical and economic indicators into the capital planning matrix, institutional decision-makers can systematically schedule phased investments, avoid unnecessary infrastructure overhauls, and preserve continuous educational operations.