Commissioned by the City of Hamburg, Navigant assessed options for the thermal transformation of the city’s building sector. Navigant’s "Built-Environment-Analysis-Model" BEAM2 made it possible to create a total balance of the current heat consumption as well as develop future scenarios from building-specific indicators. Based on the data, Navigant derived detailed emission pathways and recommendations to support a strategy for achieving Hamburg's climate protection goals.
Core measures include elevated standards for new construction and refurbishment, the expansion of heating networks, and a higher share of renewable energy sources. Overall, a mix of efficiency measures in buildings as well as the decarbonization of heat generation coupled with expanding heating networks (from 24% in 2015 to 60% in 2050) form the basis for the heat strategy in urban areas. The potential savings would render Hamburg’s 2050 goal of saving 80% of greenhouse gas emissions compared to 1990 levels feasible.