EN ISO 12759:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Fan installation, efficiency and tolerance
6 Ratings
Annex A (normative) - Energy efficiency grades for bare shaft
        fans
Annex B (normative) - Calculation method to determine
        efficiency of component parts
Annex C (informative) - Variation of fan performance between
        installation categories
Annex D (informative) - Input power calculation for driven
        fans at design point
Annex E (informative) - Selection of fans for best efficiency
Annex F (informative) - Determination of efficiency grade for
        a driven fan
Annex G (informative) - Explanatory note
Bibliography

ISO 12759:2010 specifies requirements for classification of fan efficiency for all fan types driven by motors with an electrical input power range from 0,125 kW to 500 kW. It is applicable to (bare shaft and driven) fans, as well as fans integrated into products. Fans integrated into products are measured as stand-alone fans.It is not applicable to fans for smoke and emergency smoke extraction; fans for industrial processes; fans for automotive application, trains, planes, etc.; fans for potentially explosive atmospheres; box fans, powered roof ventilators and air curtains or jet fans for use in car parks and tunnel ventilation.