*contributes to 50 credits available for operational energy rating
To minimise operational energy consumption and the associated carbon emissions by employing effective energy management practices, increasing intrinsic energy efficiency of the building fabric and installing energy efficient buildings services and equipment.
Annually, how much energy is consumed by the asset in kWh/year (as metered in the reporting period)? Please enter the start and end date of the annual reporting period for consumption data.
|Credits||Fuel type||Units||Start date||End date|
|-||Grid supply electricity||kWh/year|
|-||Other petroleum gas||kWh/year|
|-||Renewable heat source or renewable cooling source||kWh/year|
Note: Consumption data, start and end date should be entered under Ene 19a in the BREEAM In-Use Online Platform.
|1||For all energy sources, all consumption data must relate specifically to the floor area of the asset that is being assessed. This must be the GIA floor area that has been entered under Asset Dimensions.|
|2||Assessors must ensure that the reporting period for each energy source is between 11 – 13 months (334 to 397 days) and that the maximum time gap between the earliest start and the latest end date across all fuels must be no greater than 14 months (428 days).|
|3||All energy consumption must be entered for the asset. If the asset uses an energy source that is not listed, please contact BRE for guidance on how to account for this.|
Table 30: Fuel specific guidance is provided below:
Fuel usage can be recorded through:
|The consumption figure is for fuel which has been used directly within the asset NOT for vehicles or other appliances which operate on-site, unless this is specified within the scope.|
|Other petroleum gas|
Calculating the amount of fuel consumption can be achieved through:
|Fuel consumption related to the burning of solid material for the purposes of creating heat, such as Smokeless fuel, Coal and Anthracite|
|Biodiesel||Cooking oil can only be used when it has been appropriately refined to a standard which is suitable for fuel usage.|
|Biogas||Biogas can be used from off-site suppliers or as a result of on-site generation, following a process such as anaerobic digestion etc.|
|Wood||For wood/waste wood, fuel consumption can be achieved through invoices for materials purchased during the reporting period and calculations based on the calorific content of the material.|
|Renewable heat source or renewable cooling source||Consumption date should be calculated from metered data.|
For district heating and/or cooling consumption, energy consumption can be calculated through, but not limited to:
Verification of consumption data
Where consumption data has been entered into the Part 2 Energy Calculator, the Assessor must provide evidence to support it and demonstrate its correlation to the assessed area. The consumption figures shall be supported by either corresponding energy bills or verified meter readings. This means that, for example, simply submitting a spreadsheet containing consumption figures is not compliant and clear demonstration that this has been verified is required. Furthermore, it is also possible that the energy bills available to an asset might not coincide with the assessed area for the asset, in which case further evidence is required to demonstrate the assessed consumption for the assessed area.
Since there are many different methods in which energy data can be monitored (e.g. manual meter readings, Energy Management Systems etc.), the format used when submitting meter readings often varies between assessments, leading to confusion for Assessors on whether particular evidence meets the requirements.
When neither energy bills nor meter readings (verified by the Assessor) are available for the assessed area it is possible to submit the following evidence to support consumption data figures:
- Clear description of how the consumption data was obtained, e.g. manual reading, automatic reading from a BMS, energy bills, etc.;
- Clear description of any calculation carried out, e.g. energy use determined by subtracting submetered data from main meter readings;
- Clear reporting of the period the consumption data relates to, i.e. start date and end-date for each consumption figure;
- Clear confirmation that the figures submitted refer to the consumption for the assessed area and that they are based on metered data, rather than estimations or apportionment). Such confirmation will be provided and signed from either someone internal to the organisation or the Assessor themselves.
Note: Where this is undertaken by someone other than the Assessor, the Assessor must be satisfied that the information is correct, and that the individual has a good understanding of metering systems and of the metering strategy of the particular asset being assessed. This should be clearly outlined within the Assessor comments.
Energy sources start being used, or stop being used part way through the reporting period
BREEAM considers the overall consumption for a 12-month period rather than when sources were added or changed during that period. Where an energy source, such as on-site renewable energy generation capacity, begins contributing to or stops contributing to the energy used by the asset part way through the year, the start and end dates entered should still match the reporting period for all energy uses.
Non-standard energy consumption:
The energy consumption for large energy intensive loads and all external lighting may be subtracted from the overall asset energy consumption where it is separately sub-metered.
Examples of non-standard energy uses include:
- Gyms: The area/room that comprises the gym and any associate changing rooms.
- Indoor swimming pools: The area/room that contains the swimming pool and any associated changing rooms.
- Mechanically ventilated car parking: The area comprising the car park.
The intention is that the user enters energy consumption data based on 365 day reporting period; for both years. However, it is possible to enter data for any reporting period between 11 and 13 months. Any reporting period outside of the 11 to 13-month range would be invalid and result in zero credits being scored.
Validity of consumption data
In order to maintain the reliability of data entered into the BREEAM In-Use Online Platform, any consumption-related data submitted must have a reporting period start date which is no more than one year prior to the start of the assessment (creation of a measurement).
For example, if the assessment was started on the 3rd of January 2020, the reporting period start date cannot be prior to 3rd of January 2019. A more recent period can always be entered, as long as the Assessor can verify that the data is correct for the period entered.
|-||The evidence below is not exhaustive, please also refer to the ‘BREEAM evidential requirements’ section in the scope of the Guidance for appropriate evidence types which can be used to demonstrate compliance.|
|1||Calculations based on inventory data.|
|2||Copies of energy bills or verified meter readings/ photographic evidence of meters for the beginning and end of the reporting period for each energy source.|
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