prEN ISO 12759-3

SLOVENSKI STANDARD
01-februar-2017
9HQWLODWRUML.ODVLILNDFLMDXþLQNRYLWRVWL]DYHQWLODWRUMH,62',6
Fans - Efficiency classification for fans - Part 3: Fans without drives at maximum
operating speed (ISO/DIS 12759-3:2016)
Ventilatoren - Effizienzklassifizierung für Ventilatoren - Teil 3: Ventilatoren ohne Antriebe
bei maximaler Betriebsgeschwindigkeit (ISO/DIS 12759-3:2016)
Ventilateurs - Classification du rendement des ventilateurs (ISO/DIS 12759-3:2016)
Ta slovenski standard je istoveten z: prEN ISO 12759-3
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 12759-3
ISO/TC 117 Secretariat: BSI
Voting begins on: Voting terminates on:
2016-12-16 2017-03-09
Fans — Efficiency classification for fans —
Part 3:
Fans without drives at maximum operating speed
Ventilateurs — Classification du rendement des ventilateurs
ICS: 23.120
THIS DOCUMENT IS A DRAFT CIRCULATED
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ISO/DIS 12759-3:2016(E)
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2016

ISO/DIS 12759-3:2016(E)
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

ISO/DIS 12759-3:2016(E)
Contents  Page
Foreword .iv
Introduction .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Units and symbols . 2
5  General information . 2
5.1 Use of installation categories . 2
5.2 Tolerances . 3
6  Efficiency grade evaluation . 4
Annex A (normative) Energy efficiency grades for fans without drives . 6
ISO/DIS 12759-3:2016(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12759 was prepared by Technical Committee ISO/TC 117, Fans, Subcommittee SC , .
This second/third/. edition cancels and replaces the first/second/. edition (), [clause(s) / subclause(s)
/ table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.
iv © ISO 2016 – All rights reserved

ISO/DIS 12759-3:2016(E)
Introduction
The last decade has seen not only an escalation in the price, but also an increasing recognition of the
finite life of many of the fossil fuels currently used. There is also a belief by many that climatic change
is due to an increase of carbon dioxide in the atmosphere. This has lead to many nations reviewing
methods of energy generation and usage.
To maintain economic growth there is therefore a need to promote energy efficiency. This requires better
selection of equipment by users and therefore better design of this equipment by its manufacturers.
Fans of all types are used for ventilation and air conditioning, for process engineering – drying,
pneumatic conveying, and combustion air supply and for agriculture etc. Indeed, the energy usage by
fans has been calculated to be nearly 20 % of the worldwide usage.
The fan industry is of a global nature, with a considerable degree of exporting and licensing. To ensure
that the definition fan performance characteristics are common throughout the world a series of
standards have been developed, it is the belief of the industry that there is now a need for minimum
efficiency standards to be recognised. To encourage their implementation, a classification system is
proposed which incorporates a series of efficiency bands. With improvements in technology and
manufacturing processes the minimum efficiency levels may be reviewed and increased in time.
DRAFT INTERNATIONAL STANDARD ISO/DIS 12759-3:2016(E)
Fans — Efficiency classification for fans —
Part 3:
Fans without drives at maximum operating speed
1  Scope
This international standard deals with the classification of fan efficiency for all fan types which have
a nominal input power rating of 0,125 kW and above. This standard may be used by legislators or
regulatory bodies for defining future energy saving targets. This standard applies to fans only, i.e. not
including a drive, but not to the system (finished Original Equipment Manufacturer’s product, e.g. box
fans and roof fans or ventilation system) in which it is installed.
2  Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5801:2007, Industrial fans —
...