Curtain walling. Air permeability. Performance requirements and classification included-in-kit Metric (A/F) 3

Metric (A/F) 3

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Curtain walling. Air permeability. Performance requirements and classification included-in-kit Metric (A/F) 31 Scope This European Standard specifies requirements and classification of air permeability of both fixed and openable parts of curtain walling, under positive and negative static air pressure. NOTE This European Standard applies to curtain walling as specified in prEN 13830.