New Construction / NOR / 2016 /
03 - Energy
Information correct as of 11thApril 2021. Please see kb.breeam.com for the latest compliance information.
Acceptable alternative strategies to sub-metering by floor plate - KBCN00071
An alternative sub-metering strategy, not based on a by-floor-plate basis, would be acceptable provided that:
- it provides an equivalent, or more useful level of detail than sub-metering by floor plate.
- it divides the assessment in a logical manner which provides useful information to building management re: energy use.
- the approach does not conflict with requirements for sub-metering other functional areas.
The intent of sub-metering by floor plate is to allow a large homogenous function (such as office space) to be split up into smaller areas that will allow building management to monitor, identify and influence areas of high energy use. Alternatives that also meet this intent are also acceptable.
Accessibility of energy metering systems - KBCN0580
Energy metering systems should be accessible and the energy consuming end uses visible to building users, such as the facilities manager, where present, and/or other building occupants responsible for the management of the building.
Combined sub-metering of electric heating and small power equipment - KBCN00068
For bedrooms and associated spaces in multi-residential or residential institution building types, it is acceptable, for an electric heating system to be combined with lighting and small power for metering purposes, provided that sub-metering is provided for each floor plate or other appropriate sub-division.
For these building types, sub-metering electric heating in multiple bedrooms may be costly and technically challenging. Where occupants have individual control but are not responsible for paying the utilities bills, the building manager may have little influence on their energy consumption, therefore sub-metering electric heating would provide little or no benefit in meeting the aim of the Issue.
Combined system for heating/cooling and domestic hot water - KBCN0329
Where a common plant that serves the heating / cooling and domestic hot water will be used and where it is not technically feasible to provide separate meters, it is permissible to provide combined metering.
In such cases, a full justification by the design team must be provided in the QA report.
Communal Laundry Facilities – Domestic or Commercial Washing Machines - KBCN0613
The table provided in the manual highlights the criteria for an appliance to be considered domestic or commercial. However, for multi-residential projects (or other building types containing laundry facilities), the BREEAM assessor should use their judgement to determine whether the appliance is commercial or domestic, and justification of the category selected must be provided. For instance, commercial and domestic sized washing machines can be defined based on load size or power rating.
Communal Laundry Facilities- Commercial Sized Tumble Dryers - KBCN0555
Tumble dryers should be taken in to account when calculating the total annual unregulated energy consumption of communal laundry facilities with commercial sized appliances.
Heat recovery from a commercial sized tumble dryer exhaust can be used as an alternative to the solutions listed within the Ene 08 credit issue provided it will achieve a meaningful reduction of energy demand, and justification can be given as to why this method has been implemented over those recommended in the manual.
The list of equipment types and compliance requirements is not intended to be exhaustive, however where alternative solutions are proposed, the design team must provide justification and evidence as outlined above, to the satisfaction of the assessor.
Counterbalancing ratio fixed - KBCN0327
The requirement to analyse the counterbalancing ratio can be omitted if the project team can provide a statement confirming that it has been set by the manufacturer due to existing standards and to maximise efficiency. The remaining criteria must be met.
Deemed to comply solutions – alternative proposals - KBCN1214
The solutions listed for each category in the Table are examples deemed to comply with the requirements, without further justification or calculations to demonstrate a meaningful reduction in unregulated energy consumption.
If an alternative solution is proposed, justification and/or calculations are required to demonstrate this.
Drying space in hotel/ hostel projects - KBCN0174
The Drying space issue is not applicable to projects where occupancy is transient, such as hotel or hostel type developments, but does apply to long term residential buildings.
There is little potential in reducing the energy from drying clothes in hotel and hostel bedrooms compared to long term residential buildings.
Emergency lighting - KBCN0185
Maintained systems featuring emergency light fittings which are also used for normal operation, are assessed for this issue. Non-maintained lighting which is only activated in an emergency can be excluded from the assessment.
The aim of this credit is to encourage and recognise external energy-efficient fittings. Non-maintained emergency lighting will very rarely be activated and in such extremes the emergency requirements must not be compromised.
Energy efficient laboratories – scope - KBCN1254
This Issue is also applicable to 'Offices with Research and development areas' and other buildings with research and development facilities that contain laboratory space and containment devices/areas.
Technical manual to be updated accordingly in next reissue.
Energy performance assessment for part of a whole building - KBCN0596
If the assessment is only covering part of a whole building, the energy performance assessment must be representative of the part of the building being assessed. Simply taking the energy performance assessment of the whole building would not therefore comply, especially if the non-assessed parts of the building were of a different use. A separate energy assessment of the part of the building is likely to be required.
The energy performance assessment must be representative of the parts of the building being assessed.
This also applies to the predicted energy performance and all energy modelling for the prediction of operation energy consumption.
Amended 01/09/2020 to cover UKNC2018 - Prediction of operational energy consumption
Energy sub-metering – Single occupancy & function - KBCN0491
In large buildings of single occupancy/tenancy where there is only one homogeneous function (e.g. hotel bedrooms, offices), sub-metering should be provided per floor plate.
Evacuation lifts - KBCN0437
Evacuation lifts, which will be used during an emergency only, can be excluded from the relevant BREEAM criteria. However, if these lifts are used during the normal operation of the building, then they still need to be assessed.
Extending a lift shaft - KBCN0802
Where the scope of works regarding a lift only includes extending the lift shaft to other floors, then assessment of this lift is not appropriate. Where changes are made to the lift system, then assessment is required.
Where changes to lift systems are made, these lifts need to be included in the assessment to encourage specification of energy efficient transport systems.
External lighting inside wider building - KBCN0906
Where a building undergoing assessment is located inside of another building, for example a retail unit within a shopping centre, Ene 03 External lighting and Pol 04 Reduction of night time light pollution should be assessed as follows;
'External lighting' that is inside of the wider building, using the example above the lighting is external of the retail unit itself but inside of the wider shopping centre, criteria relating to the luminous efficacy should be applied as presented within the manual. For the criteria relating to controlled for prevention of operation during daylight hours and presence detection in areas of intermittent pedestrian traffic, however, instead of demonstrating that the lighting is not operational during daylight hours, it should be demonstrated that the lighting is not operational outside of the operational hours of the wider shopping centre. Any external lighting within the scope of works being assessed that is located outside of the wider shopping centre, for example if the retail unit had an entrance or exit that leads on to the street outside, this would need to be assessed against the criteria presented within the manual.
If the building undergoing assessment has no external lighting that is outside of the wider building, it can be considered that the building has no external lighting. However, as above, any external lighting within the scope of works of the assessment that is located outside of the wider building will need to be assessed as the criteria is presented within the manual.
10/05/2019 Reference to specific criteria numbers removed and made applicable to UK NC2018
Fabric testing and inspection in hot climates - KBCN0790
The requirements for thermographic survey and air tightness testing are applicable to both, cold and hot climates. A suitably qualified professional will advise on the appropriate testing conditions and specific methods in order to address this issue in different climatic conditions.
Building fabric air tightness is important in different climates in order to ensure than no additional energy is consumed due to increased heating or cooling demand originating from the lack of integrity of the building fabric.
Feasibility study – comparison with connection to existing LZCs - KBCN0563
In carrying out a feasibility study (covering all the areas required as stated in the manual) the primary intent is to demonstrate to a reasonable level of certainty that the chosen LZC is the most appropriate of all those available.
Some of the options (for example community heating/cooling schemes) may not allow for a simple like for like comparison but a comparison can be made overall across many factors. For example in a community heating scheme the life cycle costing estimate might need to be simply the cost of using and maintaining the system for the measuring period, if upfront costs and payback period information is not available. Similarly for an existing community scheme, planning would not be a barrier but land use and noise impacts could be compared.
The feasibility study must include a comparison of all criteria and for it to show that each has been factored into the final option being made. While some options may provide information in different formats and differing levels of detail making direct comparisons not straightforward, a comparison can still be made and this should aim to be as comprehensive and representative as possible. This will serve to demonstrate with reasonable certainty that the chosen option is the most appropriate.
Head-end systems for smart meters - KBCN0933
As the central component in an Advanced Metering Infrastructure (AMI), head end systems allow data communication and collation from a large and disparate set of smart meters.
Where smart energy meters and sub-meters are to be installed, a head-end system is required for any strategy utilising this technology to be considered for compliance.
Individual and shared drying facilities in larger developments - KBCN0260
Individual bedrooms: an adequate internal or external space with posts and footings, or fixings capable of holding:
This is to avoid over-provision of shared drying facilities in larger developments.
- Two metres of drying line per bedroom where drying facilities are provided in each room, OR;
- Two metres of drying line per bedroom for the first 30 bedrooms, plus one metre of drying line for each additional bedroom where drying facilities are shared.
Laboratory facilities not restricted to building type - KBCN1340
In order to allow buildings with appropriate laboratory facilities to assess the energy performance of their labs, all assessments containing laboratory space and containment areas will be able to assess Issue ‘Energy efficient laboratory systems’, even where the relevant technical manual confirms that the Issue is not applicable to this building type. The Issue remains not applicable to primary and secondary school buildings given the limited scale of their laboratories.
Assessments registered prior to 1 July 2019 have the choice to follow the guidance as stated in the technical manual. They can exclude laboratories by responding negatively to the questions regarding laboratory facilities. For assessments registered after this date, all projects containing laboratories within the scope of the assessment should include the Issue in the assessment.
LCC – LZC energy sources discounted - KBCN0606
When sufficient information can be provided to justify that LZC energy sources are not appropriate for the development, the LCC analysis, for those LZC sources, do not need to be included in the feasibility study.
The feasibility study (covering all the areas required as stated in the manual) intends to demonstrate, to a reasonable level of certainty, that the chosen LZC is the most appropriate of all those available.
Lifts with speeds less than 0.15m/s - KBCN1146
Lifts with speeds less than 0.15m/s fall outside the scope of ISO 25745 and can, therefore, be excluded from the assessment of this Issue. This applies, for example, to lifts in single dwellings or those installed in other low-rise buildings, specifically for the use of persons with impaired mobility.
LZC technologies – energy centre or other LZCs connected at a later stage - KBCN0267
If a project specifies LZCs that have been proposed in the feasibility report which reduce emissions, and/or will be connected to a site-wide energy centre operational at a later stage of the phased development, after the Post Construction Stage review has been submitted, the Energy and Pollution issues can be assessed as follows:
In a phased development where the primary heating system will be upgraded at a later stage than the building being assessed, a commitment to install the new heating source must be made in the General Contract Specification (as per the BREEAM requirements). BREEAM does not specify a particular time for phasing as it is difficult to set parameters, however as a rule building users should have to wait the least time possible before they can use the upgraded heating source.
For the quality audit, two Energy model outputs/EPCs must be produced at the final stage - one with the actual interim system installed for building control, and one for the BREEAM assessment which can include the predicted energy from the proposed energy centre. Additionally, the legally binding general contract specification for the new heating source must be submitted with details of the timescales proposed for the completion of the second phase of work. Where this approach is to be followed BREEAM must be consulted in each case to ensure that the arrangements are sufficiently robust to award the credits.
BREEAM seeks to recognise the environmental impacts of a building's energy use throughout its life, therefore temporary arrangements can be accommodated, provided there is robust evidence on future connection to the permanent systems.
LZC technologies – planning conditions and restrictions - KBCN0535
Where a mandatory planning condition exists (eg to attach to a District Heating Scheme), this will clearly affect the number of options available in a feasibility study. In such cases, compliance can still be achieved where evidence on the planning condition restrictions is provided, and it is clarified how this excludes other technologies from being considered.
The feasibility study will still need to be carried out to cover the remaining energy needs of the building (eg Electrical and lighting load in the case of a district heating scheme).
LZC technologies – shell only feasibility study - KBCN0409
For a shell only project, compliance may be assessed on the built form only i.e. demonstrating that sufficient space and clearance for the installation of future LZCs has been considered, the built form is suitably sited, and that massing and orientation are optimised for the future systems.
Measures in CIBSE TM50 for Kitchen and catering facilities - KBCN0663
The measures are listed in the section summaries (blue boxes) in the guide. The sections that follow each summary in the Guide are explanations of the measures. Therefore you can refer to these parts if you need further clarification about the measures.
When considering which measures to target, first discount any energy efficiency measures which are not applicable to the project, or are specifically excluded in the criteria.
Of the remaining measures, where the criteria requires that two thirds or more are to be achieved always round up any figures. For instance if there are five applicable measures in a section, four will need to be achieved. If there are only two, both will need to be achieved.
Many measures in TM50 require consideration of what is the best option or specification. The intent of our criteria is to demonstrate that these measures have been considered by the relevant specialist and have informed the design and specification of the catering facilities, but energy savings do not need to be quantified.
At design stage it is acceptable for a letter or document to be produced confirming how each measure has been considered along with justification for how this has informed the specification. Where the measures require training to be carried out, relevant training materials could be used as evidence. At post-construction stage, any type of general evidence deemed appropriate by the assessor would be sufficient to confirm the specified measures have been installed.
25/08/2017 Updated to clarify compliance and evidence requirements.
New build extension using existing lifts - KBCN0444
Where the assessment is only of a new build extension (and not the existing building), lifts present in the existing building fall outside the scope of Ene 06 and do not need to be assessed. The applies only when the lifts are not being renewed or undergoing a major refurbishment.
Night-time operation – requirement for controls - KBCN1048
Projects which operate at night-time can adapt or omit the requirement to provide controls or presence detection to align with the building’s hours of operation.
The aim of this Issue is to reduce the energy use for external lighting and should not interfere with the building’s operation.
No unregulated energy consumption in the building - KBCN00066
Where there are no items, contributing to the unregulated (or equipment) energy consumption in the building, there is currently no mechanism to award credits. If, however, in this situation, significant contributors, not listed in the table, will be specified, the design team should justify how a meaningful reduction will be achieved for these contributors, in order to demonstrate compliance.
08/05/19 Wording amended to account for situations, where a meaningful reduction in unregulated energy can be demonstrated by other means.
18.05.2017 KBCN applicability removed for NC2011 and NC2013, for which compliance can be demonstrated via the three shell and core options, as per the technical manual.
Office equipment – mobile devices - KBCN00041
Mobile devices such as smartphones and tablets, which are generally used without connection to an electrical power source, should be excluded from the assessment of the energy efficient equipment issue.
Devices which are not generally connected to an electrical power source when used are excluded from the 'office equipment' definition as they do not directly affect the unregulated energy consumption of the building.
Only lifts in building are for persons with impaired mobility - KBCN1330
Where the only lifts, escalators or moving walkways in the assessed development are for persons with imparied mobility with speeds no greater than 0.15m/s, and there are no lifts which fall within the scope of the criteria, the Issue should be filtered out of the assessment. Credits cannot be awarded by default.
Point of use water heaters - KBCN0773
Small 'point of use' water heaters can be excluded from the sub-metering requirements.
Only major energy consuming systems that have a measurable impact on the operational energy consumption need to be included.
Re-used electrical equipment - KBCN0325
BREEAM does not currently recognise the reuse of electrical equipment as the most energy efficient option for compliance with this issue. If it can be demonstrated that such existing electrical appliances meet the criteria for inclusion in the relevant national or international energy efficient equipment schemes, these can be considered compliant.
If new equipment is procured in addition to the re-use of the old equipment, the existing equipment may be excluded from this assessment. In these situations the assessor must be satisfied that the new equipment would make a meaningful reduction to overall unregulated energy consumption.
This issue assesses the reduction of unregulated energy consumption in operation and does not currently assess embodied energy in the manufacture of equipment.
Regenerative drives – requirement for specification - KBCN1253
Requirements for the specification of a regenerative drive for lift installations are subject to an analysis of resultant energy savings. However, where it can be demonstrated that this is not financially viable, accounting for payback over the service life of the installation, this option can be discounted.
Please also refer to other scheme-specific guidance relating to this requirement.
RGB LED lighting - KBCN0986
RGB LED lighting must be assessed against the average external lighting efficacy benchmark.
The current criteria do not completely rule out the use of RGB LED lighting as it can potentially be combined with other types of external lighting to meet the average efficacy benchmark.
Self-contained dwellings or units with individual utility meters - KBCN0199
Where self-contained dwellings or units covered by the assessment have their own individual energy supply and utility meter (e.g. water, gas or electricity), this supply can be excluded from the scope of the issue. All shared energy supplies and common areas under the responsibility of building management are still included in the assessment.
For example, if self-contained flats in an assisted living development have individual gas supplies with their own utility meter, this supply will be excluded from the assessment. However, the lighting and small power comes from a shared distribution board on each floor, in which case this shared supply will need to be sub-metered in accordance with the criteria.
12/09/2018 Applicable to Water Monitoring Issue where appropriate
27/09/2017 The word 'units' added to include a wider range of scenarios falling under this principle.
Space heating as major energy use - KBCN0939
Where possible, space heating should always be considered as a major energy use for sub-metering purposes.
Where space heating cannot be separated from hot water, this must be fully justified by the design team at QA.
See KBCN0329: Combined system for space heating/cooling and domestic hot water.
Where electric space heating is used, this in itself cannot be used as justification for combining the space heating along with lighting and small power unless there is a clear justification for doing so.
See KBCN0068: Combined sub-metering of electric heating and small power equipment.
Thermal modelling for shell only developments - KBCN0784
For shell only developments, in order to achieve criterion 1, thermal modelling can be completed on the basis of a typical notional layout and equipment specification for the particular building type (retail, restaurants, cinema etc.) can be used to demonstrate compliance.
Towel rails - KBCN00081
Towel rails cannot count towards the drying line requirements.
Clothes drying lines are provided to reduce the need to tumble drying clothes, which uses a lot of energy. Using towel rails to dry clothes would require the potentially damp towels to be stored while the clothes dry. This is inconvenient and therefore means the aim of the credit is less likely to be met.
Transportation analysis carried out by the lift manufacturer - KBCN0232
BREEAM recognises that lift manufacturers / suppliers are often engaged to provide such specialist advice. Where the assessor is satisfied that the analysis has been carried out correctly, the analysis can be submitted as compliant evidence.
Information correct as of 11thApril 2021. Please see kb.breeam.com for the latest compliance information.