Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Performance tolerances for purpose-designed fans
5.1 Information to be provided by the purchaser
5.2 Information to be provided by the supplier
5.3 Tolerances
5.4 Purchasing arrangements
5.5 Contractual testing
6 Performance tolerances for series-produced fans
6.1 Tolerances in certified ratings programmes
7 Methods of conversion
7.1 Conversion of air performance test data
7.2 Conversion of sound power test data
8 Technical data presentation
8.1 General
8.2 Essential information
8.3 Fan performance chart
8.4 Additional information
Annex A (normative) - Documentation
Annex B (normative) - Marking
Annex C (informative) - System resistance as a function
of flowrate
Bibliography