ISO/TC 117/WG 11 - Energy efficiency classification

This document establishes a classification of fan efficiency for all jet fan types driven by motors with an electrical input power range from 5,5Â kW to 155Â kW (and this is likely to be in the size range 500Â mm to 1600Â mm diameter with motors rated between 5,5Â kW and 150Â kW from IECÂ 60034-30-1). This document is not applicable to jet fans for use in enclosed car parks. This document can be used by legislators or regulatory bodies for defining future energy saving targets.

This document establishes a system for the classification of fan efficiency for all fan types driven by motors of nominal rating 0,125 kW and above. It applies to driven fans only, but not to the system (finished original equipment manufacturer's product, for example box fans and roof fans or ventilation system) in which they might be installed. This document describes a number of different procedures to classify the efficiency of a fan or to apply a minimum efficiency limit (MEL). Those procedures are described in: — ISO 12759-3; — this document (ISO 12759-4); — ISO 12759-5; — ISO 12759-6. There is no method described to compare these classifications and MEL's.

This document establishes a classification for fan efficiency. It applies to all electric-motor-driven fan systems that utilize a specific combination of components as defined below: a) fan airflow performance determined in accordance with an accepted performance standard; b) polyphase induction motors with nominal motor efficiency specified in this document; NOTE 1 Other types of motors are explicitly excluded. c) pulse-width modulated variable frequency drives (VFDs) for use with single motors; NOTE 2 Single VFDs that service multiple, parallel fan motors are excluded. d) mechanical power transmissions that utilize V-belts, flat belts, cog belts or couplings.

This document establishes a system for the classification of fan efficiency for all fan types which have a nominal fan shaft power rating of 0,125 kW and above. This document is applicable to fans only. It does not apply to drives or the system in which fans are installed. This document can be used by legislators or regulatory bodies for defining future energy saving targets.

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.