End User Segment

Energy Performance Index (EPI) is the key metric used for benchmarking energy usage in commercial building. EPI is the energy used per unit area measured as kWh/m2/year or kWh/person/year.

Most commercial buildings in India have EPI between 200-400kWh/m2/year vs. buildings in North America with EPI less than 150kWh/m2/year. Energy conscious buildings in India have achieved EPIs of 100-150kWh/m2/year. The national benchmark is 180kWh/ m2/year. Buildings with EPI of 180kWh/m2/year are ECBC compliant.

Compare your EPI with existing studies

BEE has collected energy consumption data across five different categories covering the five different climatic zones in India. This was part of the ECO III project.

The five categories of buildings are:

  • BPOs
  • Hotels
  • Hospitals
  • Shopping Malls
  • Data centers and IT parks

The energy consumption of a building is a function of the use, physical, operational and location characteristics. Simple EPI does not take into account physical, location and operational characteristics. Hence a regression-based methodology has been used. Normalization of data followed by a regressive method has yielded the following EPIs:

Office Buildings

Office buildings include buildings in private and public sector, which have conditioned and unconditioned space. On an average private office buildings have higher EPIs than public buildings. Within the private sector, private non BPOs have higher EPIs than that of BPOs. Private and public office buildings in warm & humid regions have highest EPIs.


Small private multi specialty hospitals have higher EPIs than large ones. It has been noted that EPI increases with built up area (BUA) for smaller hospitals but decreases with increase in BUA of larger hospitals. Also small multi specialty hospitals’ dependency on locally generated power is three times that of the dependency of the large hospitals. Multi specialty hospitals in hot & dry and temperate zones were observed to have higher EPIs than ones in cold and composite zones. The ones in warm & humid zones had the lowest EPIs amongst multi specialty hospitals.

Luxury Hotels

Luxury hotels in warm & humid areas have the highest EPIs followed by the ones in hot & dry and than composite zones.

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