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Table 5 Constraint and guide values for the non-heating energy consumption indexes of office buildings [kW h/(m2 a)] (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

Building class Cold and severe cold regions Hot-summer cold-winter regions Hot-summer warm-winter regions Mild regions
Constraint value Guide value Constraint value Guide value Constraint value Guide value Constraint value Guide value
Class A Office buildings of party and government agencies 55 45 70 55 65 50 50 40
Commercial office buildings 65 55 85 70 80 65 65 50
Class B Office buildings of party and government agencies 70 50 90 65 80 60 60 45
Commercial office buildings 80 60 110 80 100 75 70 55
  1. The running time of the system in a class A building can be reduced by opening exterior windows to utilize natural ventilation; however, class B buildings need to rely on mechanical ventilation and air conditioning systems all year round