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Table 6 Constraint and guide values for the heating energy consumption indexes of buildings (source: Standard for Energy Consumption of Building (GB/T51161-2016))

From: Research on technology clusters and the energy efficiency of energy-saving retrofits of existing office buildings in different climatic regions

Province City Heating energy consumption index of building [Nm3/(m2 a)]
Constraint value Guide value
Regional central heating Residential quarter central heating Single-building household heating Regional central heating Residential quarter central heating Single-building household heating
Shaanxi Xi’an (natural gas) 7.4 8.2 7.1 3.1 4.2 3.8
Shaanxi Xi’an (coal) 6.3 11.1 / 3.0 5.6 /