In-Use / BIU International Residential V6 / Part 1 /

01 - Health and Wellbeing

Information correct as of 26thFebruary 2026. Please see kb.breeam.com for the latest compliance information.

Carbon monoxide detection – Combustion appliances located outside - KBCN1586

Where all combustion appliances are located outside in the open air, no flues pass through an occupied space and there are no enclosed parking areas, the associated credits can be filtered out as per Criterion 1.

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. NC / RFO / BIU V6 Ene 17: The aim of these credit(s) is to encourage and recognise energy-efficient fittings. Non-maintained emergency lighting will very rarely be activated and in such extremes the emergency requirements must not be compromised. BIU V6 Hea 05: Flicker is eliminated from maintained systems only.
24-Jan-2024 - Scheme applicability updated to include BIU V6.

Inclusive design – Access4you  - KBCN1826

BREEAM recognises the use of Access4you certification as an approved alternative to the credits available in Hea12 Inclusive design as set out below:

Hea 12 Inclusive design Access4you
2 credits Bronze level
4 credits Silver level or higher

Evidence of Access4you certification must be provided at the final BREEAM certification stage.

AboutAccess4you

Access4you International is an organization that evaluates, certifies, and qualifies the accessibility of the built environment. Their self-developed criteria system consists of 1000 aspects, which are based on the usability aspects of 8+1 stakeholder groups, including people with special mobility, visual, hearing, and cognitive needs. The rating system consists of Certified location, Bronze, Silver, or Gold qualifications.

Access4you has two schemes, the Design & Building certification scheme which is aligned with a new construction or major refurbishment project and the Building certification scheme which is aligned with an assessment of an existing building. The most appropriate scheme, advised by Access4you should be used for certification.


Methodology – Procedure for measuring illuminance - KBCN1721

The following guidance, found in the Methodology section of BIU International V6 Commercial, can also be applied to BIU International V6 Residential assessments: For assets with identical lighting systems and floor layouts across multiple areas or floors, illuminance levels in a representative sample of areas or floors may be measured, if in the professional opinion of the suitably qualified person, these are likely to give measurements that reflect the performance of the lighting in all relevant spaces within the asset. Illuminance measurements must be taken at least every five years and after any changes to lighting systems. Where the asset is less than five years old and illuminance levels were assessed as part of the design or construction of the asset that demonstrate compliance with the criteria in this assessment issue, then the results of these studies may be used as evidence (assuming there have been no changes to the lighting systems in the intervening period).

Minimising flicker – scope of issue - KBCN1639

Principle Flicker from all lighting systems is eliminated. This means eliminating flicker in: Only emergency lighting is excluded. See KBCN0185. Lighting flicker is undesirable regardless of location or length of exposure. Commercial scope Eliminate flicker in all lighting. Residential scope Eliminate flicker in:

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.

User controls – Thermal comfort - KBCN1813

The requirement for user controls does not mandate a specific type of control; e.g. local manual adjustment. Where control is provided indirectly, e.g. via BMS or central management, the assessor must demonstrate that this approach meets the intent of the user comfort and accessibility criteria and is informed by end-user discussions or relevant design guidance. Please refer to KBCN0170 for clarification of the types of space requiring user controls.

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.
Information correct as of 26thFebruary 2026. Please see kb.breeam.com for the latest compliance information.