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Approach and Methodology

The Display calculation tool determines the primary energy, carbon dioxide equivalents and water consumption performance indicators using the so-called “operational rating scheme”. Display pilot cities opted for this scheme because:

- Final energy consumption data can be easily obtained; and
- Operational rating certificates can be updated yearly and therefore also act as a measure of quality of the management and used to motivate the building - caretakers and users.

The first step for all Display® Campaign participants is to collect simple baseline data and feed this into the Display® calculation tool. Data requirements include readily available information such as:

- Annual consumption for lighting and equipment in kWh
- Annual heating and hot water consumption in kWh
- Annual water consumption in m3

Click below to see the sample sheet:

PDF - 314.5 kb

Click here to test the calculation tool for free.

Asset rating vs operational rating

The calculation methodology for Asset rating is based on the characteristics of a building and its installed equipment for lighting, ventilation and air-conditioning assuming standard conditions for occupancy, climate, environment and use.

Operational rating is based on metered energy consumption which includes energy uses for all purposes and in actual conditions.

Compare and display annual consumption and carbon data

The statistics section of the calculation tool allows each Display® user to compare the energy, and water use for their building stock by year and compare the total carbon emission of their buildings.

 
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