SIST EN ISO 5801:2018

SLOVENSKI STANDARD
SIST EN ISO 5801:2018
01-julij-2018
1DGRPHãþD
SIST EN ISO 5801:2009
Ventilatorji - Preskušanje lastnosti na standardiziranih merilnih progah (ISO
5801:2017)
Fans - Performance testing using standardized airways (ISO 5801:2017)
Ventilatoren - Leistungsmessung auf genormten Prüfständen (ISO 5801:2017)
Ventilateurs - Essais aérauliques sur circuits normalisés (ISO 5801:2017)
Ta slovenski standard je istoveten z: EN ISO 5801:2017
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
SIST EN ISO 5801:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 5801:2018

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SIST EN ISO 5801:2018


EN ISO 5801
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2017
EUROPÄISCHE NORM
ICS 23.120 Supersedes EN ISO 5801:2008
English Version

Fans - Performance testing using standardized airways
(ISO 5801:2017)
Ventilateurs - Essais aérauliques sur circuits Ventilatoren - Leistungsmessung auf genormten
normalisés (ISO 5801:2017) Prüfständen (ISO 5801:2017)
This European Standard was approved by CEN on 18 May 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5801:2017 E
worldwide for CEN national Members.

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SIST EN ISO 5801:2018
EN ISO 5801:2017 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 5801:2018
EN ISO 5801:2017 (E)
European foreword
This document (EN ISO 5801:2017) has been prepared by Technical Committee ISO/TC 117 “Fans” in
collaboration with Technical Committee CEN/TC 156 “Ventilation for buildings” the secretariat of which
is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2018, and conflicting national standards shall be
withdrawn at the latest by April 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5801:2008.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 5801:2017 has been approved by CEN as EN ISO 5801:2017 without any modification.

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SIST EN ISO 5801:2018

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SIST EN ISO 5801:2018
INTERNATIONAL ISO
STANDARD 5801
Third edition
2017-09
Fans — Performance testing using
standardized airways
Ventilateurs — Essais aérauliques sur circuits normalisés
Reference number
ISO 5801:2017(E)
©
ISO 2017

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SIST EN ISO 5801:2018
ISO 5801:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 5801:2018
ISO 5801:2017(E)

Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, abbreviated terms and subscripts .10
4.1 Symbols and abbreviated terms.10
4.2 Subscripts .12
5 General .13
6 Test configurations .14
6.1 General .14
6.2 Category A configuration .15
6.3 Category B configuration .15
6.4 Category C configuration .15
6.5 Category D configuration .15
6.6 Inlets and outlets .15
6.7 Fans with significant swirl .15
6.8 Airways .15
6.9 Test space.16
6.10 Leakage .16
6.11 Test report .16
7 Carrying out the test .16
7.1 Working fluid .16
7.2 Rotational speed .16
7.3 Steady operation .16
7.4 Ambient conditions .16
7.5 Pressure readings .17
7.6 Test for a specified duty .17
7.7 Test for a fan characteristic curve .17
7.8 Operating range .17
8 Airways for duct simulations .17
8.1 General .17
8.2 Common segments at fan inlet (iCS) .17
8.3 Inlet duct simulation (iDS) .19
8.4 Common segment at fan outlet (oCS) .20
8.5 Outlet duct simulation (oDS) .21
8.6 Long duct (LD).22
8.7 Loss allowances for standardized airways .23
8.7.1 Loss allowances for an inlet common segment (iCS) .23
8.7.2 Loss allowances for inlet duct simulation (iDS) .24
8.7.3 Loss allowances for outlet common segments (oCS) .24
8.7.4 Loss allowances for duct simulation at outlet (oDS) .25
8.7.5 Loss allowances for long duct (LD) .25
9 Standardized test chambers .25
9.1 General .25
9.2 Pressure tappings .25
9.3 Flow-settling means .25
9.3.1 General.25
9.3.2 Piezometer ring check . .26
9.3.3 Blow through verification test .26
9.3.4 Outlet chamber reverse flow verification test .26
© ISO 2017 – All rights reserved iii

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SIST EN ISO 5801:2018
ISO 5801:2017(E)

9.4 Standardized inlet test chambers (iTC) .26
9.4.1 Test chambers .26
9.4.2 Fan under test . .29
9.5 Standardized outlet test chambers (oTC) .30
9.5.1 Test chambers .30
9.5.2 Fan under test . .30
10 Various component parts for a laboratory setup .31
10.1 General .31
10.2 Variable supply system .31
10.2.1 General.31
10.2.2 Throttling device . .31
10.2.3 Auxiliary fan .31
10.3 Straightener .31
10.3.1 General.31
10.3.2 Cell straightener .31
10.3.3 Star straightener .32
10.4 Transition parts .33
10.4.1 General.33
10.4.2 Rectangular/circular transition .34
10.4.3 Circular/circular transition .34
10.4.4 Connection for double-inlet fans .35
11 Standard test configurations.35
11.1 Units .35
11.2 Measuring flow rate .40
11.3 Standard test configurations A .41
11.4 Standard test configurations B .42
11.5 Standard test configurations C .42
11.6 Standard test configurations D .42
12 Measurements .43
12.1 Calibration .43
12.2 Dimensions and cross-sectional areas .43
12.2.1 Tolerance on dimensions .43
12.2.2 Cross-sectional area .43
12.3 Rotational speed .44
12.4 Power input .44
12.4.1 General.44
12.4.2 Motor input power .44
12.4.3 Fan shaft power .45
12.4.4 Impeller power .46
12.4.5 Transmission systems .46
12.5 Mass flow rate .46
12.6 Temperature .47
12.6.1 General.47
12.6.2 Accuracy of temperature measurement .47
12.6.3 Correction for high velocities .47
12.7 Humidity .48
12.8 Pressure .48
12.8.1 Barometers .48
12.8.2 Manometers .49
12.8.3 Damping of manometers .49
12.8.4 Checking of manometers .49
12.8.5 Position of manometers .49
12.8.6 Average pressure in an airway .50
12.8.7 Construction of tappings .50
12.8.8 Position and connections.51
12.8.9 Methods of measurement .51
12.8.10 Checks for compliance .51
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SIST EN ISO 5801:2018
ISO 5801:2017(E)

12.8.11 Use of Pitot-static tube.51
12.9 Air properties .52
12.9.1 General.52
12.9.2 Density of air at section x .52
12.9.3 Air viscosity .53
12.9.4 Standard air .53
13 Reference conditions .53
14 General rules for conversion of test results .54
14.1 General .54
14.2 Laws on fan similarity .54
14.2.1 General.54
14.2.2 Geometrical similarity.54
14.2.3 Reynolds number similarity .55
14.2.4 Mach number and similarity of the velocity triangles .55
15 Calculations.55
15.1 Test results.55
15.1.1 General.55
15.1.2 Temperature .56
15.1.3 Pressure .58
15.1.4 Set of formulae .
...