Overview
EN ISO 52016-3:2023/A1:2025 is an amendment to ISO 52016‑3 that extends and clarifies the calculation procedures for adaptive building envelope elements. It adds normative, harmonized reference control scenarios for elements with dynamic solar shading (e.g., external/integrated roller blinds, venetian blinds, shutters) and chromogenic glazing. The amendment corrects textual/table references and provides detailed state definitions, illuminance thresholds and control logic intended for energy performance calculations of heating and cooling needs, internal temperatures and sensible/latent heat loads.
Key topics and requirements
- Reference control scenarios (Annex C, normative): Detailed states and state identifiers for manual and automated control, covering residential and non‑residential (office) space categories.
- Dynamic solar shading and chromogenic glazing: Scenarios cover external, internal and integrated devices and include secondary states (for venetian blinds: slat angles 0°, 45°, 80°; internal manual exceptions noted).
- Daylight/solar thresholds: Tables (e.g., Table C.1) specify low/high daylight illuminance values (in klux) for different modes and space types - used to trigger control actions in simulations.
- Control types and behaviour modelling: Includes environmentally activated control plus four additional control types (manual, motorised, automated, etc.), occupant intervention corrections and statistical fractions for non‑responding occupants.
- Temporal and stability rules: Minimum control time interval (1 h) and allowance for delay times after threshold crossings to avoid oscillation.
- Corrections and clarifications: Multiple editorial and reference corrections across clauses and tables to align identifiers, parameters and table references (improves consistency for implementers).
Applications and who uses it
This amendment is intended for professionals involved in building energy assessment and façade control simulation:
- Energy modelers and simulation software developers - to implement standardized control scenarios for façade elements in hourly/dynamic simulations.
- Façade, glazing and shading manufacturers - to verify performance claims and provide input data consistent with ISO/CEN routines.
- Building designers and HVAC engineers - to assess heating/cooling energy needs and internal comfort impacts of adaptive envelopes.
- Certification bodies and regulators - to adopt harmonized methods for energy performance compliance and labeling.
- Researchers and consultants - for comparative studies, optimization and occupant‑behaviour sensitivity analysis.
Related standards
- ISO 52016 series (energy needs for heating/cooling, internal temperatures and heat loads) - this is Part 3 amendment.
- Relevant CEN/TC 89 and ISO/TC 163 guidance on thermal performance and calculation methods.
Keywords: EN ISO 52016-3:2023/A1:2025, energy performance of buildings, adaptive building envelope, dynamic solar shading, chromogenic glazing, calculation procedures, reference control scenarios, building simulation.
