Overview
EN ISO 52022-1:2017 (CEN adoption of ISO 52022-1:2017) is a European/International standard for the energy performance of buildings that defines a simplified calculation method to quantify the solar and daylight behaviour of solar protection devices combined with glazing. The standard provides a clear, repeatable approach to estimate:
- Total solar energy transmittance through glazing plus shading,
- Direct solar energy transmittance (beam component),
- Light transmittance (daylight transmission) of the combined system.
EN ISO 52022-1:2017 forms part of the EPB (energy performance of buildings) standards and was prepared by CEN/TC 89 in collaboration with ISO/TC 163.
Key topics and technical requirements
- Scope and outputs: Defines the outputs to be reported (solar and daylight transmittance values) and the intended time intervals for calculation.
- Input data: Specifies required data for glazing (optical/thermal properties) and for solar protection devices (geometry, position, optical properties).
- Calculation procedure: Presents a stepwise simplified method to combine glazing and shading characteristics into overall transmittance results without requiring full spectral or ray-tracing models.
- Reporting and documentation: Requires a standardized report format including drawings, inputs used, calculation choices and results to ensure transparency and reproducibility.
- Annexes: Includes a normative template (Annex A) for input/method selection, informative default choices (Annex B) and regional references (Annex C) to support consistent use across jurisdictions.
Practical applications and users
Who uses this standard:
- Architects and façade designers - to assess shading impacts on solar gains and daylighting during early design and specification.
- Energy assessors and modelers - to include simplified solar/shading inputs into building-energy simulations and compliance checks.
- Window and solar protection manufacturers - to produce performance data for combined glazing+shading assemblies and product datasheets.
- Regulators and certifiers - for national/regional compliance frameworks tied to EPBD requirements and to harmonize assessment methods.
Typical uses:
- Early-stage facade optimization and daylight/solar trade-off studies.
- Input generation for building energy performance calculations and certification.
- Supporting compliance with energy performance regulations and product labeling.
Related standards
- ISO 52022 series (other parts addressing more detailed methods)
- Superseded: EN 13363-1:2003 (and amendments)
- EPB standards set and EU Directive 2010/31/EU (Energy Performance of Buildings Directive)
Keywords: EN ISO 52022-1:2017, solar protection devices, glazing, energy performance of buildings, solar transmittance, daylight transmittance, simplified calculation method, EPB standards, CEN.
