Energy Benchmarking

Energy use is benchmarked using EPA’s Portfolio Manager.

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Portfolio Manager tracks energy meters based on the energy source.  There are several types of energy meters available:

Electricity
Natural Gas
Steam
Kerosene
Fuel Oil
Diesel
Propane
On site renewables
Wood
Hot Water
Chilled Water
Coal

Energy use is measured in kBtu’s.  This data comes from utility bills that are entered into Portfolio Manager. The calculated kBtu is then divided by the building’s square footage.  The result is the building’s Energy Use Intensity (EUI).

To calculate the energy percentage difference over the competition year, the weather normalized EUI from the previous year is subtracted from the weather normalized EUI of the current year.  The calculated difference is how we determine the biggest losers.

EUI = kBtu’s/square footage

Current Year – Prior Year = % lost or gained

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