HEA 02 - Control of glare from sunlight

Applicability – no occupied spaces - KBCN1551

Principle Where:

• The scope of assessment covers no occupied spaces and,
• There is no valid way to filter credits from that issue,

Credits specifically related to occupied space are not awarded. Outcome The tables below show how this principle applies to affected issues.

• Y means all credits are available (unless the comments state otherwise). Standard filtering rules still apply, so some credits can be filtered out where allowed in the criteria.
• N means all credits in the issue cannot be awarded. These credits are not filtered out.

Issue	Credits available		Scope
Part 1
Hea 01 Daylighting	Y		Only answer C is available.
Hea 02 Control of glare from sunlight		N
Hea 03 Internal and external lighting levels		N
Hea 04 Lighting control		N
Hea 05 Minimising flicker from lighting systems	Y
Hea 06 View out		N
Hea 07 User comfort control		N
Hea 08-13	Y
Part 2
Hea 14 Thermal comfort		N
Hea 15 Smoking policy	Y
Hea 16 Indoor air quality management	Y
Hea 17 Acoustic conditions		N
Hea 18 Legionella risk management	Y
Hea 19 Drinking water management	Y

16-Dec-2022 - KBCN title and scope updated for better visibility. Error in Hea 03 amended. Applicability of KBCN applied only to affected issues (N, or modified answer options) with to minimise header space in the UI. Original content on Resources moved to new KBCN.
27-Nov-2025 - KBCN applicability updated to include all Hea credit issues.

 

---

Control of glare from sunlight – hotel rooms - KBCN1087

The primary function attributed to hotel rooms is that of a bedroom and as such, lighting and resultant glare are not considered to be problematic for these spaces. The only exception to this is where designated additional office 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.

01 Nov 2023 - Applicability to BIU V6 Commercial confirmed
This KBCN aligns with KBCN0666 from UKNC 2014

---

Control of glare from sunlight – Use of EN 14501 to demonstrate compliance for blinds - KBCN1737

The criteria set the following requirements for blinds:

• an openness factor of 1% or less and
• a light transmission value less than 10%

Alternatively, Class 3 and Class 4 solar protection devices in Table 7 of EN 14501:2021 can be considered as meeting the BREEAM criteria. The following meets Class 3 within EN 14501 and can, therefore, be considered compliant:

• an openness factor of 1% or less and
• a light transmission value of 10% or less

02 Sept 2025 - KBCN reworded to clarify the intent.

---

Glare control – Modelling - KBCN1800

The ‘Glare control’ criteria do not require a specific methodology to be used to identify areas at risk of glare, and in most situations, a simple solar path analysis would be suitable. Alternatively, detailed hourly modelling methods, such as DGP and ASE, may be more appropriate. However, in either case, compliance cannot be assumed. Regardless of the methodology used, the modelling must be supported by robust reporting to demonstrate that each aspect of the criteria has been met.

---