2. Key performance requirements
2.1 General
European standard NF EN 13659 specifies the performance requirements for window and door closures. Minimum performances are not necessarily required for all characteristics: classifications are sometimes defined to enable product comparison.
2.2 Wind resistance
The wind resistance of window closures is probably the most important feature of these products, at least from a safety point of view.
Standard NF EN 13659 defines a classification based on the...
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Key performance requirements
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