prEN ISO 13349

SLOVENSKI STANDARD
01-september-2021
Ventilatorji - Slovar in definicije kategorij (ISO/DIS 13349:2021)
Fans - Vocabulary and definitions of categories (ISO/DIS 13349:2021)
Ventilatoren - Terminologie und Klassifizierung (ISO/DIS 13349:2021)
Ventilateurs - Vocabulaire et définitions des catégories (ISO/DIS 13349:2021)
Ta slovenski standard je istoveten z: prEN ISO 13349
ICS:
01.040.23 Tekočinski sistemi in sestavni Fluid systems and
deli za splošno rabo (Slovarji) components for general use
(Vocabularies)
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 13349
ISO/TC 117 Secretariat: BSI
Voting begins on: Voting terminates on:
2021-07-16 2021-10-08
Fans — Vocabulary and definitions of categories
Ventilateurs — Vocabulaire et définitions des catégories
ICS: 23.120; 01.040.23
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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BE CONSIDERED IN THE LIGHT OF THEIR
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WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13349:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021

ISO/DIS 13349:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2021 – All rights reserved

ISO/DIS 13349:2021(E)
Contents  Page
Foreword .iv
Introduction .v
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Symbols and units .10
4.1 Symbols .10
4.2 Multiples of primary units .11
4.3 Units of time .11
4.4 Temperature of air or gas .11
5  Fan categories .11
5.1 General .11
5.2 Suitability for the fan pressure .11
5.2.1 Work per unit mass .12
5.2.2 Fan categories.12
5.2.3 Changes in air density .12
5.3 Suitability of construction .12
5.3.1 Categorization according to casing construction .12
5.3.2 Designation for hot-gas fan .13
5.3.3 Designation and recommended categorization for smoke-ventilating fans .13
5.3.4 Categorization for gas-tight fans .13
5.4 Transmission arrangements .14
5.5 Inlet and outlet conditions .18
5.6 Method of fan control .18
5.7 Designation of direction of rotation and position of parts of the fan assembly .19
5.7.1 General.19
5.7.2 Direction of rotation .19
5.7.3 Outlet position of a centrifugal fan .19
5.7.4 Position of component parts of a centrifugal fan with volute casing .19
5.7.5 Position of component parts of an axial-flow, mixed-flow or other fan with
coaxial inlet and outlet .20
5.7.6 Position of motor or other prime mover .20
5.8 Characteristic dimensions and component parts .20
5.8.1 Characteristic dimensions .20
5.8.2 Terms for fan component parts .20
Annex A (informative) Examples .42
Bibliography .44
ISO/DIS 13349:2021(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 13349 was prepared by Technical Committee ISO/TC 117, Fans.
This second edition cancels and replaces the first edition (ISO 13349:2010), which has been technically
revised.
iv © ISO 2021 – All rights reserved

ISO/DIS 13349:2021(E)
Introduction
This International Standard reflects the importance of a standardized approach to the terminology of
fans.
The need for an International Standard has been evident for some considerable time. To take just one
example, the coding of driving arrangements differs from manufacturer to manufacturer. What one
currently calls arrangement no. 1 can be known by another as arrangement no. 3. The confusion for the
customer is only too apparent. For similar reasons, it is essential to use standardized nomenclature to
identify particular parts of a fan.
Wherever possible, in the interests of international comprehension, this International Standard is in
agreement with similar documents produced by Eurovent, AMCA, VDMA (Germany), AFNOR (France)
and UNI (Italy). They have, however, been built on where the need for amplification was apparent.
Use of this International Standard will lead to greater understanding among all parts of the air-
moving industry. This International Standard is intended for use by manufacturers, consultants and
contractors.
DRAFT INTERNATIONAL STANDARD ISO/DIS 13349:2021(E)
Fans — Vocabulary and definitions of categories
1 Scope
This International Standard defines terms and categories in the field of fans used for all purposes.
It is not applicable to electrical safety.
2  Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-
section conduits running full — Part 1: General principles and requirements
ISO 5801:2017, Fans — Performance testing using standardized airways
ISO 5802:2001, Industrial fans — Performance testing in situ
ISO/CD 12759-1, Fans — Efficiency classification for fans — Part 1:General information for fans
ISO 13351, Fans — Dimensions
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5167-1 and ISO 5801 and the
following apply
3.1
Fan
rotary-bladed machine that receives mechanical energy and utilizes it by means of one or more
impellers fitted with blades to maintain a continuous flow of air or other gas passing through it and
whose work per unit mass does not normally exceed 25 kJ/kg
Note 1 to entry: The term “fan” is taken to mean the fan as supplied, without any addition to the inlet or outlet,
except where such addition is specified.
Note 2 to entry: Fans are defined according to their installation category, function, fluid path and operating
conditions.
Note 3 to entry: If the work per unit mass exceeds a value of 25 kJ/kg, the machine is termed a turbocompressor.
This means that, for a mean stagnation density through the fan of 1,2 kg/m , the fan pressure does not
exceed 1,2 × 25 kJ/kg, i.e. 30 kPa, and the pressure ratio does not exceed 1,30 since atmospheric pressure is
approximately 100 kPa.
3.1.1
non-driven Fan
a fan without motors, drives, attachments or accessories
Note 1 to entry: Also known as Bare Shaft Fan.
See ISO 12759-1.
ISO/DIS 13349:2021(E)
3.1.2
driven fan
a fan driven by an electrical motor. One or more impellers fitted to or connected to a moto
...