Ene 01 - Reduction of energy use and carbon emissions

Erratum – up to V6 – checklist A5 – lighting - KBCN1629

Item 1 of Checklist A5 states:

This is incorrect. The requirements should be:

Non-day lit areas with intermittent occupancy must have occupancy controls.
Day-lit areas must have daylight detection controls.
The controls conform to either ASHRAE 90.4 or California Energy Code.

Erratum – V6.0.0 Checklist A5 – Criterion 15 - KBCN1746

Checklist A5, Criterion 15 incorrectly states, 'The average g-value of the glazing is ≥ 60%.' This should read as follows, 'The average g-value of the glazing is less than (or equal to) 60%' The intent of this criterion is to limit the impacts of overheating. This will be updated in the next reissue of the technical manual.

Internationally approved Ene 01 calculation software - KBCN1177

The following calculation software are approved internationally and can be used, provided local weather files are available in the country of the assessment. Please make sure the approved version, in brackets, is used. If you wish to use a different one, please submit a technical query to BREEAM@bregroup.com providing details of the changes.

IES VE (all versions from 2014 onwards).
Design Builder (version 4 onwards).
TRNSYS (version 17 onwards).
eQUEST (versions 3.63b and 3.64 onwards).
Energy Plus (version 3 and version 6 onwards).
EDSL Tas (v9.5.0 onwards).
IDA ICE (Version 5.1 onwards) 2
TRACE 700 (Version 6.3.5 onwards)

Any software that has been approved on the ASWL for a particular country can be used in other countries, provided relevant weather files are available.

27-Apr-2026- TRACE 700 Software added
03-Apr-2025 - IDA ICE Software added.
26-Mar-2024 - Scheme applicability updated.
08-Aug-2022 - Applicability to BREEAM Communities 2012 confirmed.
30-Jun-2023 - Added note relating to software approved for a particular country.

LZC – Local regulations and private wire arrangements - KBCN1658

Where local regulations do not permit electricity generated by on-site renewables to be connected directly to the building, and where evidence of the relevant regulations is provided at QA, the requirement for a private wire arrangement can be waived.

On-site LZC – whole site shared connection - KBCN1424

To be recognised in BREEAM, the on-site Low and Zero Carbon (LZC) technology must have a direct physical connection to the assessed asset. OR Where the LZC technology is;

Located on the same site,
Is owned and managed by the same organization as the assessed building, and
Where it is impractical to physically connect the assessed building to the system,

It is acceptable to allocate the renewable energy generated proportionally as a calculation of the asset's predicted energy consumption compared to the total energy consumption of the whole site. To allocate renewable electricity by proportional consumption:

Obtain the total annual renewable electricity generated on-site.
Exclude all renewable electricity which has been exported to the grid.
Determine the respective electricity consumption of all assets on the whole site (predicted for new builds and measured for existing assets).

Where consumption data is missing, renewable electricity must not be allocated to the assessed asset. In this case, it is assumed that all electricity consumed is sourced from the grid.

17-Jan-2024 - Applicability BIU V6 Ene 13 removed, as this approach is not applicable to assessing the area of PV fitted.
21-Dec-2022 - Applicability to In-Use V6 confirmed.

Prediction of operational energy consumption – alternative route to Excellent minimum standard - KBCN1336

Where four credits for ‘Prediction of operational energy consumption’ are achieved, the minimum standard for Excellent in Ene 01 can be met. This is independent of meeting any minimum credit score in the issue to achieve the Excellent minimum standard. See KBCN1602. Substantial improvement To meet this minimum standard, the asset must show a substantial improvement in operational energy performance, following the ’Prediction of operational energy consumption’ criteria. This 'substantial improvement' is defined as achieving 4 credits using amended metrics generated using the dynamic simulation modelling and following the Option 1 approach. Amended definitions Performance is calculated based on amended definitions of an actual and a reference building: Amended actual building:

Actual fabric.
Expected actual occupancy.
Actual building servicing systems.

Amended reference building:

Notional fabric.
Expected actual occupancy.
Reference building servicing systems*.

*The reference building servicing system may be replaced with a gas boiler as the heat generation source. Where the performance improvement over the amended notional building does not achieve 4 credits, the BREEAM Excellent standard may still be met. Robust evidence must be provided showing that this level of performance improvement is not possible, based on constraints outside of the control of the project team.

26-Jun-2023 - Content updated to apply to International schemes. Title and wording clarified. Text on manual errata in NC 2018 3.0 moved to new KBCN.
14-Jun-2023 - Note added to confirm this is integrated into the platform for UKNC V6.1 in all countries. 
24-Aug-2022 - Content updated and applied to UKNC V6
19-Aug-2019 - Clarification for UKNC 2018 3.0.