Acceptable deviations from category II thermal modelling criteria can be made in accordance with CEN 16798-2:2019 Anne E, only when the thermal comfort assessment uses CEN 16798 to demonstrate compliance. Where this is the case, up to a 6% deviation based on yearly occupied hours can be accepted when demonstrating compliance.
Note: this KBCN no longer allows the deviations to be used for ISO 7730:2005. However, for assessments where the assessor has advised the project team based on the original KBCN, prior to this update, this will be honoured if you provide evidence of this in your assessment.
KBCN wording 16 Jan 2025 – 10 Jul 2025:
~ Acceptable deviations from the ISO 7730:2005 category B criteria thermal modelling criteria can be made in accordance with CEN 16798-2:2019 Annex E. Up to a 6 % deviation based on yearly occupied hours can be accepted when demonstrating compliance ~
10 Jul 2025 - KBCN updated following further review of relevant standards
