prEN 1366-15

SLOVENSKI STANDARD
01-februar-2024
Preizkusi požarne odpornosti za napeljave - 15. del: 1-, 2- in 3-stranski kanali
Fire resistance tests for service installations - Part 15: 1-, 2-, 3- sided ducts
Feuerwiderstandsprüfungen für Installationen - Teil 15: 1-, 2- oder 3-seitige
Lüftungsleitungen
Essais de résistance au feu des installations techniques - Partie 15 - Conduits de
ventilation à 1, 2 ou 3 côtés
Ta slovenski standard je istoveten z: prEN 1366-15
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2023
ICS
English Version
installations - Part 15: 1-, 2-, 3- sided ducts'
Feuerwiderstandsprüfungen für Installationen - Teil
15: 1-, 2-, 3-seitige Leitungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1366-15:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Test equipment . 7
5 Test conditions . 8
6 Test specimen . 8
7 Installation of test specimen . 10
8 Conditioning . 11
9 Application of instrumentation . 12
10 Test procedure . 13
11 Performance criteria . 15
12 Test report . 15
13 Field of direct application of test results . 16
Annex A (informative) General Guidance . 31
A.1 General. 31
A.2 Notes on apparatus . 31
A.3 Notes on test specimens . 31
A.4 Notes on test conditions . 32
A.5 Notes on procedure . 33
A.6 Notes on performance criteria . 33
Bibliography . 34

European foreword
This document (prEN 1366-15:2023) has been prepared by Technical Committee CEN/TC 127 “Fire
safety in buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
EN 1366 “Fire resistance tests for service installations” consists of the following:
— Part 1: Ventilation Ducts
— Part 2: Fire dampers
— Part 3: Penetration seals
— Part 4: Linear joint seals
— Part 5: Service ducts and shafts
— Part 6: Raised floors
— Part 7: Closures for conveyors and trackbound transportation systems
— Part 8: Smoke extraction ducts
— Part 9: Single compartment smoke extraction ducts
— Part 10: Smoke control dampers
— Part 11: Fire protective systems for cable systems and associated components Part 12: Non-
mechanical fire barrier for ventilation ductwork
— Part 13: Chimneys
— Part 14: Partial penetration seals
— Part 15: 1-,2- or 3-sided ventilation ducts
Introduction
The purpose of this test is to measure the ability of a representative 1 – 2 and 3 sided ventilation duct
assembly / system that is part of an air distribution system to resist the spread of fire from one fire
compartment to another with fire attack from inside or outside the duct. It is applicable to vertical and
horizontal ducts, with or without branches, taking into account joints and openings, as well as suspension
devices and penetration points.
The test measures the length of time for which ducts, of specified dimensions, suspended as they would
be in practice, satisfy defined criteria when exposed to fire from inside and outside the duct (separate
tests).
The test takes into account the effect of fire exposure from the outside where a pressure differential is
maintained in the duct as well as the effect of fire entering the ducts in conditions where forced air
movement may or may not be present.
Caution
The attention of all persons concerned with managing and carrying out this fire resistance test is drawn
to the fact that fire testing may be hazardous and that there is a possibility that toxic and/or harmful
smoke and gases may be evolved during the test. Mechanical and operational hazards may also arise
during the construction of the test elements or structures, their testing and disposal of test residues.
An assessment of all potential hazards and risks to health shall be made and safety precautions shall be
identified and provided. Written safety instructions shall be issued. Appropriate training shall be given
to relevant personnel. Laboratory personnel shall ensure that they follow written safety instructions at
all times.
1 Scope
This part of EN 1366 specifies a method for determining the fire resistance of horizontal 1-, 2- or 3-sided
ventilation ducts and ducts whose fire resistance depends on the fire resistance performance of a ceiling
or wall (where ducts are located in cavities enclosed by fire-resistant shafts or ceilings). The test
examines the behaviour of ducts exposed to fire from the outside (duct A) and fire inside the duct (duct
B). This document is used in conjunction with EN 1363-1.
This test method does not take into consideration the effect of spalling or deflection of the adjoining
floor/wall.
This test method is only applicable to ventilation ducts that have passed the test for the appropriate time
period according to EN 1366-1 (Duct A and B) in vertical and horizontal orientations.
Access panels as part of the duct, if any, are part of the test in accordance with EN 1366-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 1363-1, Fire resistance tests - Part 1: General requirements
EN 1366-8, Fire resistance tests for service installations - Part 8: Smoke extraction ducts
EN 1507, Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for
strength and leakage
EN 12237, Ventilation for buildings - Ductwork - Strength and leakage of circular sheet metal ducts
EN 20898-1, Mechanical Properties of fasteners – Part 1: Bolts, screws and studs (ISO 898)
EN 60584-1, Thermocouples - Part 1: EMF specifications and tolerances
EN 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 5167-1)
EN ISO 13943, Fire safety - Vocabulary (ISO 13943)
ISO 5221, Air distribution and air diffusion - Rules to methods of measuring air flow rate in an air-handling
duct
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply / the terms and definitions
given in EN 1363-1 and EN ISO 13943 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
fire-resistant ventilation duct
duct used for the distribution or extraction of air and designed to provide a degree of fire resistance
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.1]
3.2
combustible lining
lining / coating on the inner surface of the duct ; reaction to fire classification of the lining material (tested
in end use condition, treated as an external, non-substantial component) worse than class A2-s1,d0
according to EN 13501-1
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.2]
3.3
self-supporting duct
duct constructed e.g. from fire-protective boards without encasing a steel duct
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.3]
3.4
encased duct
4 sided or circular inner duct with 1-, 2- or 3-sided fire protective enclosure to provide fire resistance
3.5
unencased duct
1-, 2- or 3-sided duct where the fire protection itself is the air leading surface of the duct
3.6
suspension devices
components used for suspending and fixing a duct from a floor or supporting a duct from a wall
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.4]
3.7
adjoining wall
wall on the exposed side that the duct is build up against
3.8
adjoining floor
floor on the exposed side that the duct is build up against
3.9
compensator
device used to prevent damage from the forces generated by expansion
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.6]
3.10
access panel
cover for an inspection opening within the duct
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.7]
Note 1 to entry: The test specimens used here shall not incorporate access panels, these are tested in accordance
with EN1366-1.
3.11
kitchen extract duct
ductwork where combustible deposits, such as grease are likely to accumulate on its internal surfaces
[SOURCE: EN 1366-1:2014+A1 :2020, definition 3.9]
4 Test equipment
4.1 General
In addition to the test equipment specified in EN 1363-1 the following is required.
4.2 Furnace
This shall be capable of subjecting ventilation ducts to the standard heating and pressure conditions
specified in EN 1363-1 and be suitable for testing ducts in the horizontal (see Figure 1 to 4) orientation.
4.3 Fan for duct A
The fan shall be able to produce at the start and throughout the test an under-pressure of (300 ± 15) Pa
within duct A (see
...