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

  • Created:
  • Reference: 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.