NABERS Energy

  • How is a NABERS Energy for offices rating calculated?

    NABERS Energy rates the energy efficiency of an office base building, whole building or tenancy by comparing its measured energy consumption against a set of benchmarks developed using actual building performance data.

    Here’s how it works.

    The building or tenancy’s total energy use over a 12-month period is collected from billing data and meter readings. The energy use is multiplied by a constant NABERS greenhouse gas (GHG) factor. The energy use is also adjusted to account for area, climate, hours of occupancy and equipment density. This enables buildings with different attributes to be compared against the same performance targets.

    The corrected figure, called the benchmark factor, puts the building on a level playing field with other buildings in the same property market. The benchmark factor is not a kgCO2/m2 figure, but rather a value that enables a building to be located on the benchmark rating scale.

    NABERS Energy also calculates the greenhouse gas emission intensity of the building in kgCO2/m2 using current National Greenhouse Accounting factors for greenhouse reporting purposes. This information is provided in the NABERS Energy rating report, which accompanies the rating.

    The benchmark factor is compared against the star rating benchmarks, or performance targets, for the property market in the building’s own state to determine the star rating.

    A NABERS Energy rating is awarded based on the performance level the office has achieved.

    How a NABERS Energy for offices rating is calculated

    How a NABERS Energy for offices rating is calculated

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