Refurbishment and Fit Out / International / 2015 /

02 - Health and Wellbeing

Information correct as of 21stDecember 2024. Please see kb.breeam.com for the latest compliance information.

Accreditation – sampling and testing laboratories - KBCN1337

Analysis / testing laboratory NC 2016 or newer: Where an organisation used for the analysis of indoor air or emissions from building products is not accredited to ISO/IEC 17025, the organisation must be accredited, either by a national accreditation body, or by a member of any one of the following accreditation groups: European Cooperation for Accreditation International Accreditation Forum International Laboratory Accreditation Cooperation The accreditation must specifically cover the analysis of indoor air or emissions from building products. Other schemes: Accreditation to ISO/IEC 17025 is not required in the criteria. However, this KBCN has been applied to encourage a consistent approach towards accreditation. Accreditation by a national or internationally recognised organisation helps to ensure rigorous, consistent and reliable testing results. Sampling organisation If another organisation carries out sampling on behalf of the analysis / testing laboratory, this organisation does not need to be accredited to the above. However, they must provide a brief report justifying: This report is provided to the BREEAM assessor and submitted as supporting evidence for this issue. 
31-Oct-2022 Wording clarified. Scheme applicability updated.
10-Oct-2022 Title amended for clarity. Scheme applicability updated.
24-May-2022 Updated to differentiate between sampling and analysis requirements. 
07-May-2021 Added clarification regarding alternative qualifications. 
10-May-2021 Updated scheme applicability.

Acoustic performance standards - KBCN0922

For the Acoustic performance standards credits it is possible to use either: or If assessors want to use standards that have not been approved yet, they should submit these to BRE along with all relevant documents detailed in the standards approval process. The extent and scope of these local standards and the SQAs justification statement will be checked by BRE acoustic experts to ensure that the overall effect is similar to the stated BREEAM requirements.

Air-conditioned spaces - KBCN00035

Air-conditioned spaces are assessed to ensure appropriate thermal comfort levels are achieved. Cooling capacity should be sufficient to comply with the requirements of CIBSE Guide A, however providing sufficient space to install additional capacity to meet the requirements at a later date in line with projected climate change scenarios is also acceptable. In addition, if it can be demonstrated that the air-conditioning system can achieve the thermal comfort criteria in accordance with CIBSE Guide A, Table 1.5, thermal modelling does not need to be carried out. The “time out of range” (TOR) metric should be reported as 0%.  

Applicability – industrial operational areas - KBCN1342

The aim of this issue is to encourage a healthy internal environment.  For the operational areas of industrial buildings, the internal environment is dictated by health and safety requirements.  This means that the BREEAM requirements should not be made applicable to them, and so the operational areas can be ignored in the assessment of Hea 02. 
10-Oct-2022 - Title amended for clarity and consistency. Scheme applicability updated.

Applicability – retail asset with no office areas - KBCN0531

The compliance note regarding industrial and retail areas incorrectly suggests that the minimising sources of air pollution credits are not applicable to retail areas with no associated offices. These credits do apply to retail sales areas, although they are excluded for operational areas in industrial buildings. The 'potential for natural ventilation' credit is not applicable for retail sales areas, as it applies only to office areas. Therefore, where a retail building does not contain any office, this credit is not applicable. While the requirements apply to permanently or semi-permanently occupied offices, small admin areas, which are only used occasionally can be excluded. This also applies to shell only and shell and core new build projects, where it can be demonstrated that no office spaces will be provided as part of the fit-out. The online tool will award the credit by default in both issue 1.0 of the INC 2016 scheme and up to issue 1.4 of the IRFO 2015 scheme. When assessing against INC 2016 2.0 and V6, the online tool will instead filter this credit out. 
12-Oct-2022 Title amended for clarity and consistency. Made applicable to International NC V6.
11-Sep-2018 Clarification added in relation to spaces that are used occasionally, and shell only/shell and core new build projects. 
15-Sep-2017 Clarification added on the procedure for making the 'potential for natural ventilation' credit N/A on the online tool. Technical manual to be updated accordingly in next re-issue.

Applying internal partition sound insulation criteria to internal doors - KBCN0665

Where sound insulation criteria apply to internal partitions the calculations do need to include any doors which are part of the wall in question. While sound insulation performance of a typical door will be lower than for a typical wall, with careful design, specification and detailing, this can be overcome. 

Applying the requirements to shell only + shell and core assessments - KBCN00075

A Suitably Qualified Acoustician (SQA) must carry out a quantifiable assessment of the specification of the built form, construction and any external factors that are likely to affect the indoor ambient noise levels. From this assessment, the SQA must confirm that the developer’s scope of works will enable a future tenant utilising a typical fit-out and specification to meet the levels required to demonstrate compliance with the BREEAM criteria. Where the specific room functions and areas within the building are yet to be defined, the acoustician’s assessment should demonstrate that the criteria for the most sensitive room type likely to be present in the building is capable of being achieved. Where the typical fit out would include a range of requirements (e.g. offices with a mix of open plan, cellular offices, meeting rooms and breakout areas; or retail with sales floor, stock/storage, office and staff rest areas), the acoustician should make an assessment based on a speculative layout and outline specification to determine whether the requirements of the relevant best practice standard are achievable and include examples of the most sensitive room types. Where the majority of a building’s floor plan will require high performance acoustic environments (e.g. classroom/seminar buildings), then the BREEAM requirements must be achieved for the entire shell where specific layouts are not determined by the built form. Post-construction testing is not required subject to confirmation from the project team that the built form, construction and any external factors have not changed from those used in the SQA's assessment. 
14-Feb-2024 - Scheme applicability updated. Clarified applicability to shell only assessments. Title updated.
09-Aug-2019 - Updated applicability to UK NC 2018
08-Dec-2017 - Clarification added regarding post-construction evidence.
   

Approach to thermal model when using BMS - KBCN0169

Where there are smart systems such as BMS in place, modelling must consider normal operating conditions, with the heating and cooling system in operation regardless of the control strategy. In order for the design team to size the heating/cooling plant, they will carry out modelling to calculate the heat/cold loss throughout the year. Results of these calculations must be submitted, with the heating/cooling plant specification which would demonstrate that the building has been designed to ensure internal winter/summer temperatures will not drop below an acceptable level, and that in effect the winter TOR is zero. 
14 Apr 2023 Applicability to UK NC2018 and UK/Int V6 confirmed

Appropriate project stage to appoint a suitably qualified acoustician - KBCN0256

BREEAM requires that a suitably qualified acoustician is appointed at an appropriate stage of the project, so as to ensure that early design advice on criteria of pre-requisition is met. The aim is to ensure that costly amendments to building designs are not made as a result of late appointment of the acoustician. Ultimately, it is for the assessor to determine at what stage of the project is deemed to be appropriate for this appointment to have taken place given the project specific circumstances and procurement type.  

Assessing industrial spaces – exemptions - KBCN0734

The thermal comfort criteria do not apply to the operational or storage areas typically found in industrial assets or other similar asset types. The criteria is still be applied to the other parts of the asset as appropriate. Operational and storage areas often have function-related thermal requirements determined by operational or storage needs. These functional requirements override the needs of any occupants. 
17-Jan-2024 - Scheme applicability updated.
03-Nov-2020 - Issue 2.0 of UK RFO technical manual updated with new CN detailing the above.

CN1 – Part 1: Fabric and structure - KBCN0854

CN1 is applicable to more projects than simply Part 1 only assessments (as stated in the Technical Manual). It states where a Part 1 only assessment cannot demonstrate full compliance with the criteria defined in the relevant tables, 1 credit is available (unless multi-residential) where an SQA completes the tasks listed within CN1. Instead of being relevant to Part 1 assessments only, this text is actually relevant to any assessments which include Part 1, and do not include Part 4. This covers the following combinations of Parts: Please note: In relation to projects which are not multi-residential, one credit is available where the project demonstrates compliance through CN1 for 'indoor ambient noise and sound insulation', and one credit available where the project demonstrates compliance through CN1 for 'reverberation times'.

Compliant test body – alternative compliance route using a Suitably Qualified Acoustician - KBCN1412

Where acoustic testing and measurement has not been performed by an organisation or individual that meets the definition of a compliant test body, compliance with this requirement can still be demonstrated where a Suitably Qualified Acoustician has reviewed the relevant test report(s). The test report must: a) Be countersigned or authorised by a Suitably Qualified Acoustician b) Include a clear statement that the acoustic testing and measurements have been carried out in accordance with the BREEAM or HQM testing requirements AND c) Include evidence that the verifier meets the definition for a Suitably Qualified Acoustician within the relevant BREEAM or HQM technical manual

Daylighting – speculative building - KBCN0269

Where the building is speculative and therefore the final layout is not defined (e.g. only an open plan shell is provided in each tenanted space), the required percentage of each open plan shell should meet the daylighting requirements. However, where it is possible to designate separable ancillary areas that would be required in the space (such as toilets or server room), these can be excluded from the calculation. For daylight calculations in speculative projects where the layout and colours are unknown, a realistic notional layout may be used.

Daylighting – ‘Internal association or atrium areas’ - KBCN1267

This term refers to areas intended to replace outdoor recreation spaces, typically found in prisons, but which may also be present in hospitals and residential accommodation for elderly people. The requirements relating to such spaces are, therefore, not generally applicable to other building types.  

Daylighting – calculation procedures - KBCN1339

For all spaces in the building where daylight provision is relevant (these are defined in the defintions for the relevant building areas), calculate the area weighted percentage improvement in daylight (Σ Ai Pi) / (Σ Ai ). Here Ai is the floor area of space i and Pi is the percentage increase in daylight in it. The Σ operator means to sum over all the relevant spaces. In order to demonstrate compliance with criteria 4 and 5 for an improvement in existing daylighting, for each space, the percentage increase in daylight (Pi) is calculated in one of the following ways: Where only the window area or glass transmission will increase:
  1. If window area has increased but all other aspects remain the same, Pi = ((increase in glass area)/(original glass area)) x100%.
  2. If glass transmission has increased but all other aspects remain the same, Pi = ((increase in glass transmission)/(original glass transmission)) x100%.
Where many aspects will change (e.g. room size, a combination of reflectance and window size etc.):
  1. Calculate the average daylight factor (ADF) in the space ‘before’ and ‘after’. Pi =( (ADF after – ADF before)/ ADF before) x100%.
  2. Calculate the average illuminance in the space that is exceeded for 2000 hours per year. Pi =( (Average illuminance after – Average illuminance before)/ Average illuminance before) x100%.
This will be amended in the next version of the manual.

Daylighting – Changing rooms - KBCN1132

The daylighting criteria are not applicable to changing rooms.

Daylighting – communal kitchens (multi-residential) - KBCN0217

Communal kitchens should be assessed under 'Non-residential / Communal Occupied Spaces. Communal kitchens outside of self-contained dwelling units, for example a kitchen within a self-contained student flat shared between several students would be classed as a private kitchen for the purposes of this issue. However, if it was shared between rooms along a communal corridor it would be considered a communal kitchen, and assessed under 'Non-residential buildings - occupied spaces'.

Daylighting – Floor areas for average daylight calculations - KBCN0471

Where the room size is comparable and the function is the same, such as ‘kitchen’, the percentage rule needs to be applied to the total floor area. As the average daylight factor is a measure of daylight across the whole room, only whole rooms can be compliant. This is why we refer to rounding up the ‘80% of the floor area’ requirement to the rounded-up number of compliant rooms. This rule applies to rooms of a similar size and function and compliance note ‘percentage of assessed area’ includes a simple example, where all the rooms are the same size. However, this rule can still be applied to rooms of different sizes. Spaces whose size is substantially larger should meet the average daylight factor requirement on their own. In these cases, the percentage requirement is still applicable to the floor area of the remaining rooms. For example, where 80% of ‘teaching, lecture and seminar spaces’ need to comply with the average daylight factor, if we have a large lecture theatre of 200m2 and 3 seminar spaces of 30m2 each, the requirements for 80% would mean 232m2 of the floor area need to comply. This would require the lecture theatre and two seminar spaces to comply. Where a building contains different area types, the 80% minimum floor area must be calculated by each separate building area type as defined in the table listing the average daylight factors required. For example, a multi-residential building that contains kitchen areas and living room areas, would need each one of these areas to comply with the 80% minimum floor area requirement separately. In schemes where dwellings are assessed separately, this is likely to result in 100% of the relevant dwelling areas complying. This is because in a typical house with one kitchen and one living room, an 80% requirement for the kitchen and an 80% requirement for the living room, would mean the whole kitchen and the whole living room need to comply (since only whole rooms can be compliant). 
08/01/2021

Clarifications and example added.

Daylighting – requirements differing by area - KBCN0176

Where areas within a building have different daylighting requirements for the same credit, all relevant areas must meet the requirements to award the daylighting credit(s). The aim is to improve daylight conditions in all applicable area types of an assessed building.

Daylighting – retail cafe / dining areas - KBCN0968

Customer seating/dining areas in a cafe or restaurant should be considered as 'sales areas'. Sales counters, staff areas or food preparation areas, for example, should be assessed as 'Other occupied areas' in accordance with the definition of 'Occupied space'.. The requirements for 'Sales areas' are applied to transient spaces.  

Daylighting – studio flats - KBCN0866

In the case of studio flats, where there are no separating walls between occupied spaces, the minimum area of compliance for the average daylight factor requirement is based on the combined area of kitchen, living room, bed and study area. The required daylight factor for the open-plan space (subject to percentage requirement) should be based on the highest daylight factor required for any of the spaces. It is impractical to separate the open-plan space and assess the daylight according to notional lines. In order to maintain robustness, the highest daylight factor should be applied throughout.

Daylighting – uniformity ratio applicability - KBCN0584

The uniformity ratio requirements apply to the percentage of the building’s relevant areas specified in the table. In the NC 2013 scheme, this is 80%.

Daylighting uniformity criteria – Multi-residential/Residential institutions - KBCN1129

The view of sky criteria (Table 11 (b)) are applicable to Multi-residential/Residential institutions where the room depth criterion (Table 11 (c)) is used. 
Other requirements for Multi-residential/Residential institutions in the Daylighting table should read 'Either (a) OR [(b) and (c)]'
11/02/2019  

Removed applicability to 2018 as this has been corrected in the latest version of the manual

Definition – laboratory containment levels 2 and 3 - KBCN0903

Laboratory containment levels 2 and 3 are defined in: The Management, Design and Operation of Microbiological Containment Laboratories 2001, ACDP This was defined from BREEAM International NC 2016 onwards. 
11-Oct-2022 - Title amended for clarity and consistency. Wording updated. Scheme applicability updated.

Definition of concourse - KBCN0386

A concourse is an open area within or in front of a public building which is used primarily for circulation, short term waiting, or incidental interaction, analogous to the concourse of a train station. It should not be considered occupied space.  

Emissions from products – ‘no formaldehyde’ declaration - KBCN1137

Where a product manufacturer’s declaration confirms that a product contains no formaldehyde, this can be used to demonstrate compliance with both the standard and exemplary level criteria. However, where a manufacturer has made a declaration of formaldehyde class E1 without testing, this can only be used to demonstrate compliance with the standard criteria. An E1 declaration only confirms that emissions of formaldehyde are ≤0.12 mg/m3, so this would not be valid evidence to demonstrate compliance with the exemplary level criteria emission limits. The manufacturer would need to provide additional information (e.g. test report) to show that emissions from the product meet the exemplary level emission limit. 
11-Oct-2022 Title amended for clarity and consistency.

Emissions from products – absence of regulated / prohibited wood preservatives - KBCN0740

This requirement for wood panels means that PCP (pentachlorophenol, a regulated / prohibited substance) must be absent. In this case, 'absent' is defined as <5 parts per million. This must be verified by testing. 
11-Oct-2022 - Title amended to standard naming format for clarity and consistency. Wording clarified.

Emissions from products – BS EN ISO 12460-5 standard - KBCN0118

Products tested to the BS EN ISO 12460-5 standard can show compliance with the BREEAM 'emissions from products' criteria only for the following products: These products must be made from unfaced particle board, unfaced OSB or unfaced MDF. Factory production control testing must demonstrate that the product has a formaldehyde content of ≤ 8mg/100g oven dry board. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Wording clarified.
01-Dec-2017 - Previously referenced standard EN 120 superceded by BS EN ISO 12460-5 Wood-based panels. Determination of formaldehyde release. Extraction method.

Emissions from products – earlier versions of AgBB standard - KBCN0655

Guidance Note GN22 lists the standard AgBB (2015) as a recognised scheme for emissions from building products for pre-December 2015 launched BREEAM schemes. Previous versions of the AgBB scheme are not listed as recognised schemes because earlier versions of AgBB did not include any requirement for the testing of Formaldehyde. If an earlier version AgBB has been used, further evidence will be required to provide additional information on the required Formaldehyde testing. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Emissions from products – exemplary level formaldehyde requirements - KBCN1124

The exemplary level criteria for formaldehyde emission levels are not applicable to the following product types: Formaldehyde emission levels should be assessed on all other product types. This applies also to any approved alternative VOC schemes for these product types listed in GN22. 
11-Oct-2022 - Title amended for clarity and consistency.

Emissions from products – Guidance Note 22 (GN22) - KBCN0719

Latest version: v2.9, September 2024 Within the Health and Wellbeing category of several BREEAM schemes, credits are awarded for specifying materials that minimise emissions from building products of formaldehyde and volatile organic compounds (VOCs). The criteria involve meeting emission level performance requirements in accordance with compliant performance and testing standards. Guidance Note 22 (GN22) lists schemes that show equivalent or better performance than the current BREEAM and HQM criteria, and therefore can be used to demonstrate compliance with the criteria. This document should be read in conjunction with the relevant assessment issue guidance provided in the appropriate BREEAM or HQM technical manual. The guidance note contains two tables: Download Guidance Note 22 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
30-Sep-2024 - Updated for release of GN22 2.9
01-Feb-2024 - Updated for release of GN22 2.8
31-Jan-2023 - Updated for release of GN22 2.7
10-Oct-2022 - This KBCN merged with KBCN0646. Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.
25-Jan-2019 - Link to Guidance Note updated
12-Mar-2018 - Link to Guidance Note updated

Emissions from products – installations manufactured off-site - KBCN0137

Internal finishes to installations manufactured off-site such as elevators need to be assessed for the emissions from products criteria. The specification of internal finishes (regardless of whether they are installed on site or in the factory) will impact on VOC emissions. By specifying low VOC finishes, design teams will be encouraging manufacturers to consider the environmental impacts of their products. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.
 

Emissions from products – manufacturers’ calculations for paints and varnishes - KBCN0452

Manufacturers' calculations of VOC content, based on the constituent ingredients, can be used to demonstrate compliance with the testing requirement for paints and varnishes.

10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Scheme applicability updated.

Emissions from products – resin flooring - KBCN0980

Resin flooring products (such as epoxy floor coating) are assessed as ‘Resilient textile and laminated floor coverings’. 
11-Oct-2022 Title updated for clarify and consistency. Wording simplified.

Emissions from products – rigid wall covering adhesives - KBCN00076

Rigid wall covering adhesives need to meet the standard listed for flooring adhesives. 
11-Oct-2022 - Title renamed to standard naming format for clarity and consistency. Scheme applicability updated.
16-Jun-2015 - Published pending reissue of the technical manual UKNC2011/REISSUE UKNC2014/REISSUE UKRFO2014/REISSUE.

Emissions from products – scope of assessment - KBCN0212

General This issue covers any product installed or applied inside the inner surface of the building’s infiltration, vapour or waterproof membrane. Where this membrane is not present, it applies to the inside of the building envelope’s interior-facing thermal insulation layer. Only products that are installed or applied in parts of the building where their emissions are likely to affect indoor air quality need to be assessed. Paints and coatings Any decorative paints and varnishes that occupants are exposed to should be assessed. This is likely to include paints and coatings applied to walls, ceilings, floors, doors, etc. Whole products A finish applied to a product in the factory is assessed as a whole product, and not separately as a paint or coating. For instance, a wood panel has a finish applied in the factory. The whole panel, including all the elements that make up that panel, would need to comply with the requirements set for wood panel products in this issue. The finished product as a whole must meet the performance requirements / emission limits set in the manual. 
11-Oct-2022 - Title amended for clarity and consistency. Content merged with KBCN0871.
10-Oct-2022 - Wording simplified. Scheme applicability updated.
16-Jun-2017 - Title and general principle amended to extend the applicability of the KBCN to all finishes. Paints specified for specialist applications covered in KBCN0872.
 

Emissions from products – specialist paints and coatings - KBCN0872

Where a paint or coating falls within: then the paint or coating must be assessed. Specialist paints and coatings are exempted from meeting the emission limits where there are no alternative products available that can perform the function, and still meet the emission limits. This must be clearly evidenced. 
27-Oct-2022 Wording clarified. New compliance principle added from UKNC V6.
10-Oct-2022 Title amended for clarity. Scheme applicability updated.
13-Mar-2020 KBCN amended to clarify exceptions and applicability.
16-Jun-2017 Content merged with KBCN0212.

Emissions from products – testing to ISO 16000-10 - KBCN1134

Results of testing to ISO 16000-10 can be considered compliant with the relevant testing requirements of the emissions from construction products credit where the product manufacturer can demonstrate the results generated by testing to ISO 16000-10 correlate to results that would be achieved using EN 16516 or ISO 16000-9. This is because EN 16516 classifies ISO 16000-10 as an ‘indirect method’, which means “any simplified, screening, secondary, derived or alternative method. An indirect method can be applied if it provides a result that is comparable to or that correlates with the result of the reference method under the conditions applied. The validity of the correlation with the reference method is limited to the field of application for which it has been established.” 
11-Oct-2022 - Title amended for clarity and consistency. Scheme applicability updated.

Emissions from products – wall covering fabric - KBCN0724

For the 'Volatile Organic Compound emissions levels (products)' criteria: Any fabric specified as part of a wall covering should be assessed as part of the 'wall covering' requirements. It should not be assessed as part of the 'resilient textile and laminated floor coverings' requirements. 
11-Oct-2022 Title amended for clarity and consistency. Wording clarified.

Emissions from products – alternative testing standard for paints - KBCN1003

Where stated in EU Directive 2004/42/CE, ASTMD 2369 can be used as an alternative the testing standard for paints where reactive diluents are present. 
11-Oct-2022 - Title amended for clarity and consistency. Wording simplified.

Erratum – up to v1.4 – VOC emission levels - KBCN0442

The technical manual is missing the following requirement for the VOC emission levels for the product categories, which should follow the wording in criterion 8:

"At least five of the seven remaining product categories listed in Table 'VOC criteria by product type' meet the testing requirements and emission levels criteria for volatile organic compound (VOC) emissions (listed in the table)." 
11-Oct-2022 Title amended for clarity. To be amended in the technical manual re-issue.

External lighting – architectural façade lighting - KBCN0650

Architectural façade (or other decorative) lighting, which does not provide users with lighting to perform tasks outdoors, does not need to be included in the assessment of external lighting. This Issue seeks to ensure that lighting levels are appropriate for tasks which building users will be undertaking outdoors.

External lighting – High frequency ballasts - KBCN0278

The requirement for all fluorescent and compact fluorescent lamps to be fitted with high frequency ballasts does not apply to external lighting.  

Glare control – adjacent buildings - KBCN1211

It is acceptable to account for surrounding buildings, structures or other permanent environmental features when using simulation modelling to assess the risk of glare, provided this accounts for both direct sunlight and reflected glare from glazing or reflective surfaces.

Glare control – blackout blinds - KBCN0447

Blackout blinds can be used to meet the glare control requirements. Where the criteria set an upper limit for transmittance value, but no lower limit, blackout blinds will meet this requirement.

Glare Control – no relevant areas - KBCN0429

If the scope of the assessment does not include any relevant building areas, as defined within the manual, the criteria for Glare Control can be considered as met by default. Only spaces that fall within the definition of relevant areas and are within the assessment's scope need to be assessed.   
22/06/17 Wording clarified
16/06/17 KBCN amended to exclude content of KBCN0146.

Glare control – no windows in relevant areas - KBCN0146

Where a ‘relevant area’ as defined in the manual does not include any windows, the glare control criteria can considered as met for this area. Note that the view out and daylight criteria would not be achieved in rooms with no windows. Where there are no windows in a room there would be no potential for disabling glare, so the aim of the credit would be achieved.

Glare control – residential institution and multi-residential bedrooms - KBCN0666

Assuming that occupants are generally elsewhere during daylight hours, lighting and resultant glare are not considered to be problematic for bedrooms in residential institution and multi-residential assessments. The only exception to this is where designated additional office working space is provided. In these circumstances it is the role of the assessor to determine if individual spaces should be determined as 'relevant building areas' in accordance with guidance provided. Glare control criteria apply to building areas where lighting and resultant glare could be problematic for users.

Glare control – transmittance value - KBCN0709

Transmittance values should be based on those quoted for 'visible light' or 'optical transmittance'. 
10 Mar 2021 Reference to 'optical transmittance' added for clarity

Glare control – use of tinted windows - KBCN0862

Solar control or 'tinted' glazing could potentially support the attainment of this requirement. However, the assessor must be satisfied and provide evidence to demonstrate that the particular glazing type, when used on the assessed building for a given location, is meeting this overarching aim of preventing disabling glare. It should be noted that whilst certain types of glazing, such as low emissivity glazing, may be slightly tinted, they may not necessarily be effective in reducing disabling glare. For facades receiving direct sunlight, tinted windows alone are unlikely to be sufficient in the majority of situations.

Glare control for roof lights - KBCN0319

Where roof lights are present, they must be considered when demonstrating that the glare control strategy provides adequate control/measures for minimising glare in that space. All sources of glare need to be considered when designing out the potential for disabling glare.

Glare control in Part 1 assessments - KBCN0100

Although the current technical manual indicates that forms of glare control are applicable to Part1 assessments, this has been reviewed and the BREEAM Projects template now allows the credit to be filtered out for such projects. This is in line with the NC 2014 scheme and takes account of 'occupant controlled devices' not being within scope. 
28.5.21 Issue 2.0 of the UK RFO technical manual has been updated to address this.  International RFO 2016 technical manual to be updated accordingly in next reissue.
 

Glare control in residential areas - KBCN00040

Glare control criteria apply to building areas such as study bedrooms or facility management offices, where work or study will be carried out and where glare would hinder such activities. It does not apply to other residential areas.  

Hazards – Applicability of the issue - KBCN0541

The applicability of issue Hea 07 Hazard is related to the risk of natural hazards in the country, or region, in which the project is situated. This is reflected in the environmental weightings. The approach to this issue changes according to the country and to the scheme. BREEAM International New Construction 2013 and BREEAM International Refurbishment and Fit Out 2015 This issue should not be taken into consideration for countries which have a weighting for this issue equal or lower than 1%. The suggested threshold to start considering this credit is more than 1%. Where no risks are identified in the risk assessment report, this issue will not be applicable, even if the related weighting has a value higher than 1%. Thus before undertaking a risk assessment, it is recommended to investigate if the area might be subject to the natural hazards listed in the technical manual. BREEAM International New Construction 2016 Countries with no or very low risk, have a weighting of 0% for this issue. Thus, according to the BREEAM scoring and rating system, this issue should not be considered. The suggested threshold to start considering this credit is more than 0%. Where no risks are identified in the risk assessment report, this issue will not be applicable, even if the related weighting has a value higher than 0%. Thus before undertaking a risk assessment, it is recommended to investigate if the area might be subject to the natural hazards listed in the technical manual.

Hotels and Residential institutions – Short term stay - KBCN0652

For projects registered as 'Hotels and other residential accommodation - short term' two credits can be achieved under this issue: Criteria 7 to 9 are relevant only for multi-residential projects, classified as 'Residential accommodation - Long term stay'. The pre-requisite is still required in order to achieve the credit for any project type. 
Technical manual to be updated accordingly in next reissue.

Indoor air quality plan – Guidance Note 6 - KBCN0618

Latest version: v2.1 August 2022 Guidance Note 6 provides guidance to assessors and project teams regarding the content and rigour of an Indoor Air Quality Plan (IAQP) as required by the Hea 02 Indoor air quality criteria in the BREEAM New Construction and Refurbishment schemes. It should not be interpreted as BREEAM criteria. It is intended to provide assessors and project teams with further, flexible information and guidance regarding the rigour, content and tasks of an IAQP. Download Guidance Note 6 (licensed assessors only) View all Guidance Notes (licensed assessors only) 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency.

Indoor air quality plan – later consideration - KBCN1544

Where BREEAM has been engaged at a later stage in the project (for instance, at the beginning of a Post-Construction Assessment) the IAQ plan must still be produced. The late stage plan must clearly identify opportunities to improve indoor air quality that: The plan is focused on decisions and actions that can still be practically carried out. The indoor air quality plan is an on-going consideration that extends into the operational life of the asset.

Indoor air quality plan – scope - KBCN0294

Where possible, the indoor air quality plan must cover all items in the criteria. This means the plan must be completed for: Within these requirements, there is flexibility for the design team to use their professional judgement to determine what is appropriate to meet the criteria. Any exclusions must be clearly evidenced and justified. As the basis for effective asset management, the indoor air quality plan must be written in a consistent and comprehensive manner. The report must address relevant aspects as fully as possible within the scope of the development. 
11-Oct-2022 Title updated for clarity. Wording clarified. Content merged with KBCN0556. Reference to KBCN1544 added. Scheme applicability updated.

Internal lighting levels where computer screens are used - KBCN0283

For areas where computer screens are regularly used projects can specify 300 lux, as referenced in CIBSE Lighting Guide 7, rather than the levels prescribed in the standard EN 12464:2011. 
07/12/2021 Applicability to BIU V6 Commercial confirmed.
 

International suitably qualified professionals - KBCN1266

In some issues the International NC and RFO schemes prescribe specific requirements for suitably qualified professionals. We appreciate that some countries might have different recognition schemes in place, and these might differ from the BREEAM requirements. Where this is the case, assessors should submit a technical query with appropriate information, and we will review and approve each situation on a country basis.

Natural ventilation – use of CIBSE TM52 - KBCN0935

For a naturally ventilated building, it is acceptable for the thermal comfort limits and calculation methodology in CIBSE TM52: The Limits of Thermal Comfort: Avoiding Overheating in European Buildings to be used in place of ISO 7730:2005. BREEAM recognises that adaptive comfort models can provide more appropriate thermal comfort limits for naturally ventilated buildings.

Occupant control – BMS and degree of control - KBCN0175

A Building Management System controlled set point with local override controls limited to a set range would satisfy the occupant control requirement so long as the temperature range available to building users is confirmed as appropriate for the building type and user profile.

Occupant control – spaces requiring user controls - KBCN0170

This guidance is intended to clarify the types of area for which user controls are required or would be considered beneficial. Zoning is required in all areas of the asset where specified in the assessment criteria. Please refer to the specific requirements of the applicable BREEAM standard to interpret this guidance appropriately. User controls required Spaces where users are expected to have independent control over their environment. User controls not required Spaces where users are not expected to have independent control over their environment. 
14-Dec-2022 - KBCN applicability updated to include BIU. Wording clarified, and amended for compatibility with BIU criteria.

Part 2 Assessments & Thermal Zoning - KBCN0460

Some criteria related to thermal zoning and controls may not be applicable to Part 2 assessments. These should, however, be addressed as far as possible within the work to the core services and associated infrastructure, given the scope of works. Where compliance with any requirement is not possible, this should be justified by the design team in the evidence for this Issue. 
03.11.2020 Amendment made to issue 2.0 of UK RFO technical manual to include the above in a Compliance Note. This KBCN is relevant to previous issues of the manual.

10/02/2017 - This replaces the previous CN which stated, incorrectly, that the criteria relating to thermal zoning do not apply to Part 2 assessments. This approach now aligns with the BREEAM manual and the scoring & reporting tool.

PMV and PPD reporting for mixed mode ventilation buildings - KBCN0632

When assessing buildings where both naturally ventilated and air conditioned spaces are included, reporting the PMV and PPD indices is required.

Pods or privacy booths used as workstations – Impact on view out - KBCN1697

Provided the space or room itself is compliant based on a more traditional furniture arrangement, the enclosure of workstations in booths or pods can be disregarded when considering compliance with the ‘View out’ criteria.

Post-construction measurement – formaldehyde / VOC levels exceed limits - KBCN0258

If the measured formaldehyde / VOC concentrations were above the prescribed limits, the appropriate remedial action must be taken, as described in the IAQ Plan. The criterion requires confirmation of 'the measures that have or will be undertaken' however it does not specifically address re-testing. We would expect, however that the IAQ Plan should outline what remedial measures are appropriate depending upon the severity and type of the non-compliance with prescribed limits. Such measures may include re-testing as a matter of 'best practice'. Where levels are found to exceed these limits, the project team confirms the measures that have, or will be undertaken in accordance with the IAQ plan, to reduce the TVOC and formaldehyde levels to within the above limits. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Post-construction measurement – sampling methodology and KPIs - KBCN0380

When testing for VOCs post-completion and pre-occupancy, a representative sample of the building needs to be carried out. Each sample TVOC and formaldehyde measurement needs to achieve the threshold levels individually, either in the initial testing or after remedial measures have been implemented. This ensures that all tested areas of the building are below the limits, and that areas of non-compliance are not ‘averaged out’. 'When providing KPI test results for air quality post-construction / pre-occupancy within scoring and reporting tool, where the limits are exceeded and remediation and re-testing are carried out, the figure should be an average for the whole building post-remediation, as this is the key figure that reflects the building at its certified state'. Where testing is not a requirement of the IAQ Plan and this is not carried out, the original testing figures should be entered and the assessment report should provide details of the remediation measures undertaken to reduce these to within the prescribed limits. 
10-Oct-2022 Title amended to align with standard KBCN naming format for clarity and consistency. Scheme applicability updated.
06-Dec-2017 Amended to account for situations where re-testing is not required by the IAQ Plan.

Post-construction measurement- TVOC concentration using BS ISO 16000-6: 2021 VOCs in air by active sampling - KBCN1642

Where BS ISO 16000-6: 2021 VOCs in air by active sampling is used, the TVOC concentration measurement can be performed over a 40-60 minute period.

Potential for natural ventilation – areas exempted - KBCN0806

For projects where the majority of a building's occupied spaces will meet the criteria to achieve the potential for natural ventilation credit, but a relatively small area will not comply due to functional requirements of the space, (e.g. a lecture theatre), the credit can be awarded where this approach can be justified. The intention is to encourage the design of buildings where a strategy of (potential for) natural ventilation has been implemented as far as practically possible, given functional constraints. 

Potential for natural ventilation – mechanically ventilated and mixed mode assets - KBCN1533

Scope of KBCN This KBCN clarifies the associated compliance note for this credit. Clarification Mechanically ventilated and mixed mode assets can potentially achieve the 'potential for natural ventilation' credit by:
  1. Meeting the relevant criteria for room depth and glazing area OR, where this is not possible:
  2. Show through modelling that the building has the potential to be ventilated entirely via a natural ventilation strategy.
For 2. the second paragraph of the CN allows flexibility in demonstrating adaptability to an entirely natural ventilation strategy. An asset can allow for mechanical ventilation for ≤ 5% of its annual operating hours to boost ventilation rates, and (for this credit) can still be considered to be a fully naturally ventilated strategy. ≤ 5% mechanical ventilation requirement The focus of this credit is to demonstrate future adaptability to introduce fresh air into the asset for occupant comfort, so this requirement relates only to the time that mechanical systems are used to drive air through the asset. The use of active heating / cooling is not considered in this calculation. Natural Ventilation Heat Recovery Units (NVHR) systems can also be used, provided it meets this ≤ 5% requirement. ≤ 5% is a weighted average over all of the asset's occupied spaces. The basis for the weighting will be determined by the modelling software used. Scope and time scale of modelling The modelling covers all occupied spaces. Where relevant, exclusions are allowed - see related KBCNs for details. The modelling period is one year, during the asset's operating hours. The modelling must be based on a plausible scenario that is realistic. This means that: 
22-Oct-2022 Content from KBCN1126 merged to this KBCN.

Potential for natural ventilation – shell only assessments - KBCN0408

Where compliance depends on a speculative layout which is unknown, it is the responsibility of the design team to demonstrate that it is feasible for a future tenant to achieve compliance in the relevant areas via the use of a notional layout. This ensures that the shell allows the potential for compliance, and if this can be demonstrated the credit may be awarded.  

Potential for natural ventilation – use of doors to comply - KBCN0690

Doors can only be used to demonstrate potential for natural ventilation where: In all cases, the use of doors must be clearly and robustly justified by the Assessor. 
19-Oct-2022 - Wording clarified. Scheme applicability updated.

Prerequisite – users with special hearing and communication needs - KBCN0969

Intent Criterion 1c ensures that the suitably qualified acoustician has influenced the design of the asset to: What this should cover will depend on the asset type and expected users. Asset users The UK Department for Education document BB93 Acoustic design of schools: performance standards building bulletin 93 (February 2015) defines users with special hearing or communication needs as those with any of the following: This list is not exhaustive, and the suitably qualified acoustician must consider typical asset users, along with the other points a-d when giving early design advice regarding room layout, sound insulation and reverberation times. Accessibility features The principles of accessible design are universal and could be applied in a wide range of assets. Additional features that could be relevant to accessible acoustic design include, but are not limited to: The suitably qualified acoustician must use their professional judgement to determine the scope of any such features as part of the design. Where no features are applicable this must be clearly justified. 
04-Sep-2024: Wording and intent clarified. Information on additional accessibility features added. Scheme applicability updated. Title updated.
01-Mar-2019: Amended to clarify that this is a 'typical' list of users, but does not impose a new requirement.

Remedial works – timing of acoustic re-testing - KBCN1164

The intent of CN "Remedial works" is that, where these are required, re-testing is carried out prior to handover and occupation. However, it is permissible to carry out the re-testing post-occupation. This is provided any specific guidance for particular building types related test conditions have been met (for instance, it may be that some building specific guidance requires furniture or carpets to not be present during the testing). Compliance cannot be achieved based on a letter from the SQA confirming that the contractor has followed their advice to achieve the required performance. 
07.11.18 KBCN amended to allow for re-testing to be carried-out post-handover.

Reporting PPD and PMV Figures - KBCN0867

The PMV (Predicted Mean Vote) and PPD (Predicted Percentage Dissatisfied) values need to be entered into the scoring & reporting tool for data recording purposes. The thermal modelling specialist should be able to provide values for both the PMV and PPD for the asset. The values to report are the observed range of values for PMV and PPD: If the software or calculation method used does not generate these PMV / PPD metrics, they do not have to be provided. [accordion] [accordion_block title="Example"] An asset has the following thermal comfort ranges across its occupied spaces: [/accordion_block] [/accordion] 
15.09.22 Wording and example clarified.

Thermal comfort – Changing rooms - KBCN1133

Whilst thermal comfort in changing rooms may be considered as significant, such spaces are, generally, outside the scope of this Issue, as they would not fall within the definition of an 'occupied space'. 
17/06/2019 - This supersedes the advice previously provided in this KBCN, which was published in error on 13/06/2018

Thermal modelling – full dynamic thermal analysis - KBCN1250

The software used to carry out the thermal modelling simulation at the detailed design stage needs to provide full dynamic analysis. For smaller and more basic building designs with less complex heating/cooling systems, an alternative less complex means of analysis may be appropriate. Further guidance on thermal modelling can be found in CIBSE AM11 Building energy and environmental modelling.

Thermal modelling for large scale projects - KBCN1171

In cases where the scale of the project makes it unfeasible to provide thermal modelling for every space, it is acceptable to demonstrate compliance with a representative sample of floors or rooms, ensuring any worst case scenarios are included.

Thermal modelling for Part 1 assessments - KBCN0944

Where a Shell Only (Part 1) assessment is being carried out, but the future servicing strategy is unknown, the thermal comfort credit is still applicable. To assess compliance, the upgraded shell of the building shall be modelled with a typical servicing configuration which meets as a minimum: The thermal modelling credit can be awarded when the notional modelled system achieves the BREEAM thermal comfort criteria. The intent is to ensure that thermal comfort is achievable with the proposed upgraded shell for any future occupiers. The details of the notional system could be passed on to future occupiers or servicing specialists to inform their servicing strategy. 
03.11.2021 Amendments made to CN1 in issue 2.0 of UK RFO technical manual detailing the above.

Ventilation – applicability to Part 1 assessments - KBCN0974

The Ventilation credit is applicable to Part 1 assessments because there may be instances where the decisions made for the fabric and structure can have an impact on the ventilation strategy. For example, if a natural ventilation strategy is to be used, the criteria related to ventilation standards and the distance between openable windows and sources of external pollution would be relevant. 
11-Oct-2022 Title amended for clarity and consistency.
 

Ventilation – distance between air intakes and exhausts - KBCN0638

The minimum distance required between the building's air intakes and exhausts is described by r. Where the distance does not meet r, the design team must either: 
16-Aug-2024 - Applicability to INC 2016 and INC V6 removed as the guidance does not align with the criteria.
12-Jan-2023 - Value r clarified to account for different requirements in applicable schemes.
18-Nov-2022 - Requirements clarified. Title amended for clarity.
11-Oct-2022 - Scheme applicability updated. Wording clarified. Reference to EN13779 removed for international assessments, see KBCN1054.

Ventilation – e-cigarettes - KBCN1014

The use of e-cigarettes and vaporizers is considered equivalent to smoking. A smoking ban must also include a ban on e-cigarettes and vaporizers. 
11-Oct-2022 - Scheme applicability updated.
   

Ventilation – external requirement for window opening restrictors - KBCN1032

Opening restrictors to windows may sometimes need to be installed to meet: Where such external requirements are in force, these requirements cannot be used as a mitigating factor for meeting the BREEAM ventilation criteria. Even with window restrictors, adequate ventilation can still be achieved. 
19-Oct-2022 Wording and title clarified. Scheme applicability updated.

Ventilation – filtration – non-residential assets - KBCN0797

Relevant specialist required The design and specification of air filtration for mechanical ventilation requires the input and review of a relevant ventilation designer or specialist. It is their responsibility to interpret the requirements of this KBCN to align with local conditions. Referenced standard The requirements for air filtration in mechanical ventilation systems follows EN 16798-3:2017 Section B4.2. This standard replaces EN 13779:2007. See KBCN1054. Supply air quality Outdoor air quality The filtering required to achieve SUP2 is affected by outdoor air quality. Outdoor air quality (ODA) in both EN 16798-3:2017 and EN 13779:2007 are defined as: As ODA definitions are relative to national air quality standards, these will depend on local regulations and the location of the asset. Please refer to the relevant specialist on how to correctly classify ODA for your asset. 
18-Nov-2022 Title amended to differentiate between residential and non-residential filtration KBCNs.
06-Sep-2022 KBCN re-written and re-named to clarify BREEAM ventilation filtration requirements in relation to new ventilation standards. Scheme applicability updated.

Ventilation – single room MVHRs - KBCN1042

Single room mechanical ventilation heat recovery units do not need to show that the air intake and exhaust are a suitable distance apart. However, the air intakes of these units must be located to minimise intake of other potential external pollutants. 
11-Oct-2022 - Title amended for clarity and consistency. Wording simplified. Scheme applicability updated.

Ventilation – withdrawal of EN 13779:2007 - KBCN1054

Standard EN 13779:2007 has been withdrawn (01/02/2018) and in its place the following should be used: Non-residential buildings: Both standards provide three methods for selecting design ventilation rates: Dwellings (only applicable to the BREEAM International New Construction scheme): Both standards provide different options for selecting design ventilation rates: It is the design team’s responsibility to determine and apply the most appropriate method or option(s) for the project undergoing assessment. Existing projects can continue to use EN 13779:2007 where applicable. Any new assessment registrations should use the replacements above. 
03 Nov 2022 - First paragraph, bullet 3 updated to clarify methodology
11-Oct-2022 - Scheme applicability updated.
03-May-2020 - Typo corrected to clarify that 'EN 16798-1:2019 Annex B.3 'either Category I OR Category II default design values' are to be used.
10-Jan-2020 - KBCN updated to clarify methods for complying with new standards.
01-Sep-2019 - KBCN updated to reference new standard.

View out – alternative method of compliance for fixed workstations - KBCN1484

In relevant spaces that include fixed workstations* (such as a built-in cash registers or reception desks) an alternative method can be used. This is based on the number of compliant workstations. For instance, where the requirement is for 95% of the relevant area to comply, 95% of the fixed workstations must have a compliant view out, rounded up to the nearest workstation.   Example A retail assessment has 35 built-in cash registers, 95% of which must comply with the view out criteria. 35 x 0.95 = 33.25, rounded up to 34. The requirement is met for this area if 34 registers comply with the criteria.   Where an asset includes a mix of relevant areas; both fixed workstations and flexible areas, compliance for the whole assessment must be demonstrated for all areas, as appropriate, based on either area or number.   *freestanding desks and other items of moveable furniture cannot be considered as fixed workstations, regardless of whether their locations are pre-determined.

View out – Calculating the glazing to wall ratio - KBCN1506

This should be calculated based on the glazed area of window, expressed as a percentage of the area of the external wall in which the window sits. Where the ceiling height of the room is unusually high, relative to the window height, the wall area can be calculated based on a standard ceiling height for the building type.

View out – Corrections to Table - KBCN1136

The values for distance from window to workplace in the View out Table are incorrect. The Table should read as follows:  

View out – eye level - KBCN0581

BREEAM defines an adequate view out as being at seated eye level (1.2 – 1.3m) within the relevant building areas. However, where occupants will not have the option to be seated, for example in some industrial operational areas where the work being undertaken requires occupants to remain standing, the height of the view out can be changed accordingly to suit the eye level of occupants. All other view out requirements have to be met and clear justification provided for changing the height/level of the view out. In some relevant building areas, occupants may not be sitting down to undertake tasks. Allowing the view out height requirements to be changed accordingly ensures building occupants gain maximum benefit from the view out.   

View Out – First Aid Rooms - KBCN1104

The view out criteria do not apply to dedicated first aid or medical rooms in non-healthcare projects. BREEAM recognises the need for user privacy in such areas and that these are intermittently occupied.

View out – internal view within an atrium - KBCN1240

Where the criteria are otherwise met, an internal view across an unobstructed atrium void can be considered compliant. Internal views are generally not acceptable, however where it is physically impossible to obstruct the view with partitions, equipment or furniture, this can be accepted at the discretion of the assessor.

View out – no relevant areas - KBCN0876

If the scope of the assessment does not include any relevant building areas, as defined within the manual, the criteria for 'view out' can be considered as met by default. Only spaces that fall within the definition of relevant areas and are within the assessment's scope need to be assessed.

View out – percentage area - KBCN0166

For the view out credit, compliance must be demonstrated for the percentage of the floor area in each relevant building area, rather than the percentage of the total relevant building area in the building. 
14/2/17 Wording amended to clarify that the percentage must be achieved for each 'relevant building area'.

View out – relevant areas - KBCN0268

The aim of the View Out criteria is to allow occupants to refocus their eyes from close work. Relevant areas are spaces where close work in a fixed position is carried out for sustained periods of time. The view out criteria are therefore not applicable to occupied areas such as meeting rooms, or other spaces where such close work is not being carried out. Where rooms contain areas of different functions, only relevant areas should be assessed. In this case a notional line can be drawn on the plans and calculations made based on these relevant areas only. However, spaces such circulation routes or other transient spaces within a relevant area can only be excluded if the route or area is clearly defined by the building layout. If this is arbitrary or based solely on a proposed furniture layout, it cannot be excluded. Features of the building layout which may be considered as dictating a function area would include, for example, the position of doors or fixed furniture such as a reception desk or canteen servery. 
07-Oct-2022 Additional paragraph added to clarify how function areas must be defined. 
21-Sep-2022 General principle of 'relevant area' added, and applicability of KBCN extended to BIU V6 Commercial.

View out – rooms used for security or other critical functions - KBCN1040

The View out criteria are not applicable to rooms containing security or critical systems or sensitive material, such as CCTV monitoring rooms. Where it can be demonstrated that the presence of compliant windows would compromise a critical function of the space, the criteria can be considered not applicable.

View out for commercial kitchens - KBCN1216

It is not necessary to provide a view out for commercial kitchens. This is because in such a space it is likely that kitchen staff will move around, doing various tasks. This makes the requirements for the view out to rest the eyes unnecessary.

VOC product emission certificates – validity - KBCN1689

Where it can be demonstrated that construction product emission certificates were valid either at the time of specification, or at time of purchase, they may contribute to awarding credits.

BREEAM is primarily trying to encourage designers to take construction product emissions into consideration when specifying or selecting products and as such it is not necessary for certification to be valid at the time of design or post-construction stage submissions.

Weather files – 50th percentile - KBCN0117

For the thermal simulation of climate change environments, where this not specified in the manuals, the 50th percentile weather file is used in all cases. This applies also to the use of any alternative weather files or formats which are not listed in the manual. See KBCN1182. 
18-Dec-2024 - Title updated for clarity. Scheme applicability updated. Link to KBCN1182 added.

Weather files – alternative format or location - KBCN1182

Alternative format Newer weather files, or alternative weather file formats not listed in the manuals can be used instead of those referenced in the manual, if they achieve the aim of the credit. These alternative files must be based on climate projections with equal or higher temperatures than those specified in the relevant criteria, setting an equally or more robust standard for overheating. The alternative weather files must include same variables as the specified weather files for each hour of the year e.g.: - Dry bulb & wet bulb temperature, - Wind speed & direction, - Solar altitude & azimuth, - Cloud cover etc. The assessor or design team must verify this and ensure that meeting the BREEAM criteria does not become easier by using the alternative weather file. Alternative location Where the weather file for the nearest location for the project is not representative of the actual location’s climatic conditions, the project team can use the weather file from another nearby location which is more representative. This can take account of the climatic influences of altitude, prevailing wind, proximity to climate-moderating features, or heat island effect. 
18-Dec-2024 - Merged with KBCN1013. Scheme applicability updated.

Weather files – files applicable internationally - KBCN0732

The technical manual refers to Prometheus, which is not applicable internationally for the projected climate change scenario criteria. Until an alternative has been formally approved, the following can be used: Climate Change World Weather File Generator ASHRAE weather data files 
18-Dec-2024 - Title updated. Link updated.

Zoning and control – dimming - KBCN1018

Localised dimming controls installed in line with the criteria, along with a master on/off switch, can be considered as meeting the aim of the requirement for 'controls' in open plan offices. The aim is for occupants to have local control over their lighting and maintain comfortable lighting levels.

Zoning and control – PIR in circulation spaces - KBCN0332

PIR controls can be deemed compliant in circulation spaces such as corridors. In this instance 'separate occupant controls' are not required. The requirement for user control is so that the building users can have direct control over their immediate work environment to ensure it is suitable for their personal needs. In circulation spaces, occupancy is transient and PIR control in these spaces is acceptable.  

Zoning and occupant control – access to lighting controls - KBCN00032

The relevant areas for the criteria apply only to areas where users are expected to have control. For instance, this means that areas intended for the general public, or a shop floor would not be expected to have lighting controls. The general principle which applies to user access to general environmental controls (heating, cooling, ventilation) may also apply to access to lighting controls. See KBCN0170. However, the the exact approach may differ between the two types of systems and assessor judgement must be used to determine compliance. In all cases zoning is required in all areas of the asset where specified in the assessment criteria. Please refer to the specific requirements of the applicable BREEAM standard to interpret this guidance appropriately. 
14-Dec-2022 - KBCN applicability updated to include BIU. Wording updated. Link to KBCN0170 created.

Zoning and occupant control – control via BMS - KBCN0703

Occupant control via a BMS is not normally considered a compliant BREEAM solution. Any solution that requires the action of a third party (eg facilities manager) is not considered under the control of the occupant. Solutions where all relevant building occupants have control via a user-interface via BMS may be considered compliant where the assessor is satisfied that the aim of the criteria are met. User-control must be available directly to the occupant. 
01/08/2017 - KBCN applicability to Thermal comfort Issue removed.

Zoning and occupant control – PIR detection systems - KBCN0335

The aim of the Health & Wellbeing category is to recognise ways to benefit occupants through giving them control of their lighting environment. Without manual overrides, presence or absence detection lighting controls (such as PIR detection systems) are not compliant with the criteria. BREEAM recognises the energy efficiency benefits of detection systems in buildings through the Energy category. In some cases, the design team may have to prioritise one particular lighting strategy to the detriment of achieving a credit elsewhere. 
17 09 2024 Updated to apply to BIU Part 1 - Lighting Controls
28 04 2021 Wording amended to include absence detection systems.
18 09 2017 Wording amended to clarify the meaning.
 

Zoning and occupant control – whiteboards and display screens - KBCN1433

Whiteboards and display screens in dedicated teaching or presentation spaces require separate zoning and control for lighting, as specified in the criteria. Lighting around whiteboards and display screens which are typically found in general office areas, meeting rooms, or in other generic spaces do not require separate zoning and control to meet the criteria. In such cases, the assessor should provide justification. Whiteboards and display screens in dedicated teaching / presentation spaces are likely to be used frequently, and require appropriate zoning and control. An increasing number of offices and meeting rooms now include display screens - however separate zoning and control may not be appropriate.

Zoning and occupant controls – handheld remote controls - KBCN1243

Remote control light switches can be considered as compliant, on the basis that these are provided in sufficient numbers/locations to meet the aim of the criteria.

[KBCN withdrawn] ~ Areas assessed for formaldehyde and TVOC - KBCN1008

This KBCN is no longer applicable. Please refer to KBCN0871 for scope of 'Emission levels (products)' and 'Other information' section of the technical manual for scope of 'Emission levels (post-construction)'. Superseded text: Products applied or installed in parts of the building likely to affect the indoor air quality and impact the wellbeing of building users need to be assessed. Areas are not excluded on the basis of how long building users are present in those areas. 
27-Feb-2018 - KBCN N/A due to ambiguity of applicability to criteria

[KBCN withdrawn] ~ Erratum – Table 1 in GN22 v2.5 - KBCN1436

Table 1 in V2.5 of GN22 has two footnote symbols missing: • Product Type column – Paints and varnishes should read Paints and varnishes* • Product Type column – Wood panels should read Wood panels^ 
10-Oct-2022 KBCN withdrawn as GN22 has been re-issued with fixes.

[KBCN withdrawn] ~ GN22 – Scheme version applicability - KBCN0646

Table 1 is for the use of any version of a scheme where the first version was released pre-December 2015, and table 2 is for the use of any version of a scheme where the first version was released post-November 2015. 
10-Oct-2022 This KBCN has been merged with KBCN0719. KBCN withdrawn.

[KBCN withdrawn] ~ Natural Ventilation Heat Recovery Units - KBCN1126

Natural Ventilation Heat Recovery Units (NVHR) systems can be used to support a natural ventilation strategy where it can be demonstrated that openable windows provide sufficient fresh air to the building for the significant majority of the time that the space is occupied. The assessor will need to use their professional judgement to determine a 'significant majority of time' and be able to justify this within the assessment report. 
22-Oct-2022 Content merged with KBCN1533 and clarified with additional guidance on mixed mode systems. This KBCN withdrawn.

[KBCN withdrawn] ~ Scope of product assessment for VOCs - KBCN0871

For the purpose of this Issue, this covers any product installed or applied inside of the inner surface of the building’s infiltration, vapour or waterproof membrane or, where not present, inside of the inner surface of the building envelope’s interior facing thermal insulation layer. Only products that are installed or applied in parts of the building where their emissions are likely to affect indoor air quality need to be assessed. 
11-Oct-2022 - Content merged with KBCN0212. KBCN withdrawn.

[KBCN withdrawn] ~ VOC product types – other - KBCN0698

Where a product does not appear to fit into any of the defined VOC product types listed in the manual this does not mean it is automatically exempt from being assessed. If it is similar to one of the listed product types and clearly could have an impact on VOC levels it should normally be assessed. In such cases the supplier/manufacturer should seek to demonstrate that their product meets the equivalent standards required for the closest matching product type. 
19-Oct-2022 - KBCN replaced by KBCN0872.

[KBCN withdrawn] ~ VOC testing – alternative methods for compliance for paints and varnishes - KBCN0492

Manufacturers' calculations of VOC content, based on the constituent ingredients, can be used to demonstrate compliance with the testing requirement for paints and varnishes instead of ISO 11890-2:2013. 
11-Oct-2022 - KBCN is withdrawn because it is a duplicate of KBCN0452.

[Withdrawn] – Weather file location - KBCN1013

Content merged with KBCN1182. In accordance with the guidance provided in CIBSE AM11, in instances where the weather file for the nearest location does not represent the most appropriate climatic conditions for the actual location, it is permissible to use the weather file from another, nearby location, which more closely matches the climate at the actual location. This can take account of the climatic influences of height above sea level, a coastal location or other local, climate-moderating features such as mountains, woodland, lakes, prevailing wind direction or urban heat island effect. 
18-Dec-2024 - Content merged with KBCN1182.
Information correct as of 21stDecember 2024. Please see kb.breeam.com for the latest compliance information.