kSIST FprEN 1364-5:2026
(Main)Fire resistance tests for non-loadbearing elements - Part 5: Air transfer grilles
General Information
- Abstract
This document specifies a method for determining the fire resistance of air transfer grilles (ATG).
It is applicable to air transfer grilles intended for installation in building components (typically walls, floors or ceilings). The orientation of the installation of the air transfer grille can be vertical or horizontal.
The closing mechanism of the air transfer grille can come from expansion of material and/or from any mechanical or electrical closing device.
This document is applicable to fire resistant or fire resistant and smoke control air transfer grilles.
An additional test configuration is valid for fire resistant or fire resistant and smoke control air transfer grilles in applications where flame impingement is a risk during open state from start of fire (see Annex A).
This document evaluates the behaviour of the air transfer grille when exposed to the heating curve described in EN 1363 1 and the standard pressure described in EN 1363 1. It is not the intention of this test to provide quantitative information on the rate of leakage of smoke and/or hot gases or on the transmission or generation of fumes under fire conditions. Such phenomena are only noted in describing the general behaviour of test specimens during the test.
The determination of the rate of leakage of smoke at ambient temperature or at 200 °C as an optional requirement for ATG with declared smoke control is specified in EN 1634 3.
This document is not applicable to the determination of the fire resistance of air transfer grilles that are used in ducts because ATG are considered as separating elements. The test method for ATG used in ducts is described in the corresponding duct standards.
This document is not applicable to the determination of the fire resistance of a fire damper or a fire barrier connected to a duct one or both sides, as an ATG is tested as a fire-separating element on its own. Fire dampers are tested according to EN 1366 2. Non-mechanical fire barriers are tested according to EN 1366 12.
This document is not applicable to the determination of the fire resistance of air transfer grilles in fire doors, shutters and openable windows as specified in EN 1634 1 and EN 1364 2, because the deformation of fire doors, shutters and openable windows in fire conditions differs from the deformation of flexible/rigid walls. Moreover, the location of thermocouples in the door standard is too specific to be handled in this document.
All values given in this document are nominal unless otherwise specified.
- Status
- Not Published
- Public Enquiry End Date
- 30-Jul-2025
- Technical Committee
- POZ - Požarna varnost
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 26-Mar-2026
- Due Date
- 14-May-2026
- Completion Date
- 27-Mar-2026
Overview
kSIST FprEN 1364-5:2026 is a European Standard developed by CEN that specifies a method for determining the fire resistance of air transfer grilles (ATG) used in non-loadbearing building elements. Air transfer grilles are essential for allowing airflow in buildings while maintaining fire and smoke compartmentation. This standard addresses the performance of ATGs intended for installation in components such as walls, floors, or ceilings, with vertical or horizontal orientation. Both passive (intumescent) and active (mechanical or electrical) closing mechanisms are within its scope.
This test method evaluates the behavior of ATGs when exposed to heat and pressure conditions specified in EN 1363-1. While it collects general observations of smoke and hot gas leakage, it does not provide quantitative smoke leakage data; this is covered by EN 1634-3 for grilles with smoke control claims. Notably, kSIST FprEN 1364-5:2026 does not apply to ATGs used in ducts, fire dampers, fire barriers connected to ducts, or ATGs in fire doors, shutters, and openable windows.
Key Topics
- Air Transfer Grille Types: Covers fire-resistant and fire-resistant with smoke control ATGs, both modular and standard designs.
- Test Configuration: Specifies test methods for ATGs installed in both vertical (walls) and horizontal (floors, ceilings) supporting constructions, using standard fire resistance curves and pressure regimes.
- Supporting Constructions: Details requirements for standard supports (rigid, flexible, and non-standard) and the inclusion of decorative covers during testing if applicable.
- Performance Criteria: Focuses on:
- Integrity: Observed using a cotton pad and visual inspection to check for gaps or sustained flaming.
- Insulation: Measured via thermocouple placement and temperature rise limits.
- Test Reporting: Outlines mandatory content, including pressure data, thermocouple locations, performance summaries, and direct field of application.
- Field of Application: Test results are only valid for grilles installed in the tested orientation and position, with explicit guidance on acceptable modifications (e.g., dimension reductions).
Applications
kSIST FprEN 1364-5:2026 serves a vital role in the fire safety of buildings by providing a reproducible method for assessing the fire resistance of air transfer grilles as independent fire-separating elements. Typical applications include:
- Air Transfer in Compartment Walls/Floors: Verifying ATG fire resistance in walls and floors separating fire compartments.
- HVAC Integration: Ensuring grilles used for ventilation in fire-rated partitions meet required fire and, optionally, smoke control performance.
- Product Certification: Providing a test method for manufacturers seeking CE marking or national approvals for air transfer grilles.
- Building Code Compliance: Supporting designers, specifiers, fire risk assessors, and approval authorities by referencing a harmonized and robust test method.
This standard is especially relevant for projects prioritizing fire compartmentation in line with modern construction and safety regulations.
Related Standards
For comprehensive fire safety assessment and regulatory compliance, consider these related standards:
- EN 1363-1: Fire resistance tests - General requirements (heat and pressure protocols referenced by EN 1364-5).
- EN 1634-3: Smoke control tests for doors and closing devices, applicable for ATGs with declared smoke control performance.
- EN 1366-2: Test methods for fire dampers (distinct from ATGs tested as independent elements).
- EN 1366-12: Methods for testing non-mechanical fire barriers associated with ducts.
- EN 1634-1: Fire resistance testing for doors, shutters, and openable windows (not used for ATGs within this context).
- EN 1364-1/2: Testing methods for fire performance of walls and ceilings.
- EN ISO 13943: Fire safety vocabulary, providing definitions for terms used in EN 1364-5.
By referencing kSIST FprEN 1364-5:2026 and related standards, professionals can ensure air transfer grilles used in their buildings are tested for, and compliant with, critical fire resistance requirements. This supports enhanced building safety, regulatory acceptance, and confidence in fire separation solutions.
Relations
- Effective Date
- 14-Jun-2023
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Frequently Asked Questions
kSIST FprEN 1364-5:2026 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Fire resistance tests for non-loadbearing elements - Part 5: Air transfer grilles". This standard covers: This document specifies a method for determining the fire resistance of air transfer grilles (ATG). It is applicable to air transfer grilles intended for installation in building components (typically walls, floors or ceilings). The orientation of the installation of the air transfer grille can be vertical or horizontal. The closing mechanism of the air transfer grille can come from expansion of material and/or from any mechanical or electrical closing device. This document is applicable to fire resistant or fire resistant and smoke control air transfer grilles. An additional test configuration is valid for fire resistant or fire resistant and smoke control air transfer grilles in applications where flame impingement is a risk during open state from start of fire (see Annex A). This document evaluates the behaviour of the air transfer grille when exposed to the heating curve described in EN 1363 1 and the standard pressure described in EN 1363 1. It is not the intention of this test to provide quantitative information on the rate of leakage of smoke and/or hot gases or on the transmission or generation of fumes under fire conditions. Such phenomena are only noted in describing the general behaviour of test specimens during the test. The determination of the rate of leakage of smoke at ambient temperature or at 200 °C as an optional requirement for ATG with declared smoke control is specified in EN 1634 3. This document is not applicable to the determination of the fire resistance of air transfer grilles that are used in ducts because ATG are considered as separating elements. The test method for ATG used in ducts is described in the corresponding duct standards. This document is not applicable to the determination of the fire resistance of a fire damper or a fire barrier connected to a duct one or both sides, as an ATG is tested as a fire-separating element on its own. Fire dampers are tested according to EN 1366 2. Non-mechanical fire barriers are tested according to EN 1366 12. This document is not applicable to the determination of the fire resistance of air transfer grilles in fire doors, shutters and openable windows as specified in EN 1634 1 and EN 1364 2, because the deformation of fire doors, shutters and openable windows in fire conditions differs from the deformation of flexible/rigid walls. Moreover, the location of thermocouples in the door standard is too specific to be handled in this document. All values given in this document are nominal unless otherwise specified.
This document specifies a method for determining the fire resistance of air transfer grilles (ATG). It is applicable to air transfer grilles intended for installation in building components (typically walls, floors or ceilings). The orientation of the installation of the air transfer grille can be vertical or horizontal. The closing mechanism of the air transfer grille can come from expansion of material and/or from any mechanical or electrical closing device. This document is applicable to fire resistant or fire resistant and smoke control air transfer grilles. An additional test configuration is valid for fire resistant or fire resistant and smoke control air transfer grilles in applications where flame impingement is a risk during open state from start of fire (see Annex A). This document evaluates the behaviour of the air transfer grille when exposed to the heating curve described in EN 1363 1 and the standard pressure described in EN 1363 1. It is not the intention of this test to provide quantitative information on the rate of leakage of smoke and/or hot gases or on the transmission or generation of fumes under fire conditions. Such phenomena are only noted in describing the general behaviour of test specimens during the test. The determination of the rate of leakage of smoke at ambient temperature or at 200 °C as an optional requirement for ATG with declared smoke control is specified in EN 1634 3. This document is not applicable to the determination of the fire resistance of air transfer grilles that are used in ducts because ATG are considered as separating elements. The test method for ATG used in ducts is described in the corresponding duct standards. This document is not applicable to the determination of the fire resistance of a fire damper or a fire barrier connected to a duct one or both sides, as an ATG is tested as a fire-separating element on its own. Fire dampers are tested according to EN 1366 2. Non-mechanical fire barriers are tested according to EN 1366 12. This document is not applicable to the determination of the fire resistance of air transfer grilles in fire doors, shutters and openable windows as specified in EN 1634 1 and EN 1364 2, because the deformation of fire doors, shutters and openable windows in fire conditions differs from the deformation of flexible/rigid walls. Moreover, the location of thermocouples in the door standard is too specific to be handled in this document. All values given in this document are nominal unless otherwise specified.
kSIST FprEN 1364-5:2026 is classified under the following ICS (International Classification for Standards) categories: 13.220.50 - Fire-resistance of building materials and elements; 91.060.99 - Other elements of buildings. The ICS classification helps identify the subject area and facilitates finding related standards.
kSIST FprEN 1364-5:2026 has the following relationships with other standards: It is inter standard links to SIST EN 1364-5:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
kSIST FprEN 1364-5:2026 is associated with the following European legislation: EU Directives/Regulations: 305/2011; Standardization Mandates: M/117. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
kSIST FprEN 1364-5:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 1364-5:2025
01-julij-2025
Preskusi požarne odpornosti nenosilnih elementov - 5. del: Prezračevalne rešetke
Fire resistance tests for non-loadbearing elements - Part 5: Air transfer grilles
Feuerwiderstandsprüfungen für nichttragende Bauteile - Teil 5: Lüftungsbausteine
Essais de résistance au feu des éléments non porteurs - Partie 5 : Grilles de transfert
Ta slovenski standard je istoveten z: prEN 1364-5
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.99 Drugi stavbni elementi Other elements of buildings
oSIST prEN 1364-5:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 1364-5:2025
oSIST prEN 1364-5:2025
DRAFT
EUROPEAN STANDARD
prEN 1364-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2025
ICS 13.220.50; 91.060.99 Will supersede EN 1364-5:2017
English Version
Fire resistance tests for non-loadbearing elements - Part 5:
Air transfer grilles
Essais de résistance au feu des éléments non porteurs - Feuerwiderstandsprüfungen für nichttragende
Partie 5 : Grilles de transfert Bauteile - Teil 5: Lüftungsbausteine
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1364-5:2025 E
worldwide for CEN national Members.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test equipment . 7
5 Test conditions . 7
5.1 Heating conditions . 7
5.2 Pressure conditions . 7
6 Test specimen . 8
6.1 General. 8
6.2 Size . 8
6.3 Number . 8
6.4 Design . 9
6.5 Construction . 9
6.6 Verification . 9
7 Installation of test specimen . 9
7.1 General. 9
7.2 Supporting constructions . 9
8 Conditioning . 10
9 Application of instrumentation . 10
9.1 Thermocouples . 10
9.2 Pressure . 12
9.3 Radiation . 12
9.4 Other equipment . 12
10 Test procedure . 12
11 Performance criteria . 12
11.1 General. 12
11.2 Integrity . 12
11.3 Insulation . 13
12 Test report . 13
13 Direct field of application of test results . 15
13.1 General. 15
13.2 Orientation . 15
13.3 Position . 15
13.4 Number . 16
13.5 Supporting construction . 16
14 Figures . 17
Annex A (normative) Test configuration for immediate heat exposure . 24
A.1 Use of this annex . 24
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
A.2 Principle of removable shield configuration . 24
A.3 Removable shield . 24
A.4 Test procedure amendments for this test configuration . 24
Bibliography . 27
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
European foreword
This document (prEN 1364-5:2025) 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 mandate given to CEN by the European Commission and the
European Free Trade Association.
EN 1364 ‘Fire resistance tests for non-loadbearing elements’ consists of the following parts:
— Part 1: Walls
— Part 2: Ceilings
— Part 3: Curtain walling - Full configuration (complete assembly)
— Part 4: Curtain walling - Part configuration
— Part 5: Air transfer grilles
— Part 6: Cavity Barriers
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
Introduction
The purpose of this test is to measure the ability of a representative specimen of an air transfer grille to
resist the spread of fire from one side to another.
A representative sample of the air transfer grille is exposed to a specified regime of heating and the
performance of the test specimen is monitored on the basis of criteria given in this document. Fire
resistance of the test specimen is expressed as the time for which the appropriate criteria have been
satisfied. The times so obtained are a measure of the adequacy of the construction in a fire but have no
direct relationship with the duration of a real fire.
CAUTION - The attention of all persons concerned with managing and carrying out this furnace testing is
drawn to the fact that fire testing can be hazardous and that there is a possibility that toxic and/or
harmful smoke and gases can be evolved during the test. Mechanical and operational hazards can 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 needs to be made and safety precautions need
to be identified and provided. Written safety instructions need to be issued. Appropriate training needs
to be given to relevant personnel. Laboratory personnel need to ensure that they follow written safety
instructions at all times.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
1 Scope
This document specifies a method for determining the fire resistance of air transfer grilles (ATG).
It is applicable to air transfer grilles intended for installation in building components (typically walls,
floors or ceilings). The orientation of the installation of the air transfer grille can be vertical or horizontal.
The closing mechanism of the air transfer grille can come from expansion of material and/or from any
mechanical or electrical closing device.
This test method is valid for fire resistant or fire resistant and smoke control air transfer grilles.
An additional test configuration is valid for fire resistant or fire resistant and smoke control air transfer
grilles in applications where flame impingement is a risk during open state from start of fire (Annex A).
This test method evaluates the behaviour of the air transfer grille when exposed to the standard fire curve
described in EN 1363 1 and the standard pressure described in EN 1363 1. It is not the intention of this
test to provide quantitative information on the rate of leakage of smoke and/or hot gases or on the
transmission or generation of fumes under fire conditions. Such phenomena are only noted in describing
the general behaviour of test specimens during the test.
The rate of leakage of smoke at ambient temperature or at 200 °C as an optional requirement for ATG
with declared smoke control will be confirmed in accordance with EN 1634 3.
This test method is not valid for determining the fire resistance of air transfer grilles that are used in
ducts because ATG are considered as separating elements. The test method for ATG, used in ducts is
described in the corresponding duct standards.
This test method is not valid for determining the fire resistance of a fire damper or a fire barrier
connected to a duct on either or both sides because an ATG is tested as a fire-separating element on its
own. Fire dampers are tested according to EN 1366 2. Non-mechanical fire barriers are tested according
to EN 1366 12.
This test method is not valid for determining the fire resistance of air transfer grilles in fire doors, shutters
and openable windows as specified in EN 1634 1 and EN 1364 2, because the deformation of fire doors,
shutters and openable windows in fire conditions differs from the deformation of flexible/rigid walls.
Moreover, the location of thermocouples in the door standard is too specific to be handled in this
document.
All values given in this document are nominal unless otherwise specified.
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.
EN 1363-1, Fire resistance tests — Part 1: General Requirements
EN 1363-2, Fire resistance tests — Part 2: Alternative and additional procedures
EN ISO 13943, Fire safety — Vocabulary (ISO 13943)
3 Terms and definitions
For the purposes of this document, the definitions given in EN 1363-1, EN 1363-2 and EN ISO 13943,
together with the following, apply.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
3.1
air transfer grille
device consisting of an active/reactive part which could include a decorative cover as to be used in
practice, allowing movement of air at ambient temperature and pressure and providing fire resistance in
case of fire
3.2
air transfer grille flow zone
total visible surface area of the air transfer grille which allows air to flow from one side to the other (this
excludes the air transfer grille frame)
3.3
air transfer grille face
total surface area of the air transfer grille in its non-installed state (this includes any air transfer grille
frame)
3.4
aperture
opening in the supporting construction in which the air transfer grille is installed and sealed off towards
the supporting construction
3.5
modular air transfer grilles
air transfer grilles that can be fitted together to form a larger ATG unit
3.6
decorative cover
element which is not a part of the air transfer grille but may form part of the assembly achieving the fire
resistance performance
3.7
sustained flaming
continuous flaming for a period of time longer than 10 s
3.8
notional floor level
assumed floor level relative to the position of the building element in service
4 Test equipment
See EN 1363-1 and, if applicable, EN 1363-2.
5 Test conditions
5.1 Heating conditions
The heating conditions and the furnace atmosphere shall conform to those given in EN 1363-1 or, if
applicable, EN 1363-2.
5.2 Pressure conditions
Pressure conditions and tolerances shall be as given in EN 1363-1.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
Depending on the field of application, air transfer grilles installed in vertical supporting constructions
can be tested in the positive or negative pressure zone. If the grille is intended for both zones, both
scenarios should be tested.
If both tests are done in 1 set-up, the pressure level in the furnace will be organized such that the neutral
pressure plane is situated between the specimens to be tested in a negative and positive pressure zone.
The height of the neutral pressure plane in the furnace will therefore be adjusted according to the tested
specimen.
Air transfer grilles installed in horizontal supporting constructions are always considered as being
positioned in the positive pressure zone. For ATG installed in a horizontal separating element, the
pressure shall be controlled to (20 ± 3) Pa at 100 mm below the underside of the separating element to
which it is fixed.
The pressure during the test at the top and at the bottom of the ATG will be calculated and reported in
the test report and in the classification report. Also the corresponding height above notional floor level
of top and bottom of the ATG shall be reported.
NOTE The laboratories aim to achieve the specified pressures as soon as possible after commencement of the
test. However, it could happen that in case of some test configuration, high pressure at the beginning of the test
could be faced.
6 Test specimen
6.1 General
The test specimen consists of an air transfer grille together with a supporting construction. In cases
where multiple test specimens are included in a single test construction, they shall be the subject of a
separate evaluation.
6.2 Size
The test specimen shall be normally full size.
If modular air transfer grilles are tested, the largest assembly size shall be tested.
In order to avoid boundary effects, the distance between the perimeter of the air transfer grille and the
internal surfaces of the furnace shall be not less than 200 mm at any point.
In cases where multiple test specimens are included in a single test construction, the minimum distance
between adjacent air transfer grilles shall be not less than 200 mm. However, if a specific installation
requires smaller distance, then ATG shall be tested to the minimum separation used in practice.
6.3 Number
For grilles installed in vertical supporting constructions, the number of test specimens required is given
in EN 1363-1.
For horizontal separating elements, only one test specimen is required with fire exposure from the
underside.
For grilles that are not symmetrical, each side has to be tested.
Where an air transfer grille is intended for use both in floors and walls, the ATG shall be tested both
vertically and horizontally.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
6.4 Design
6.4.1 General
The test specimen shall be fully representative of the air transfer grille used in practice, including any
special features which are unique to the grille, e.g. decorative covers.
Each shape (e.g. circular, rectangular) with maximum dimensions has to be tested, to give widest
application according to the field of direct application (Clause 13).
6.4.2 Restraint
The edges of the test specimen shall be restrained as in practice. The method of restraining the air
transfer grille is considered part of the test specimen.
6.5 Construction
The test specimen shall be constructed as described in EN 1363-1.
6.6 Verification
Verification of the test specimen shall be carried out as described in EN 1363-1.
7 Installation of test specimen
7.1 General
The test specimen shall be installed, as far as possible, in a manner representative of the use in practice.
Inclusion of decorative covers: Where decorative covers are to be supplied with the air transfer grille and
installed symmetrically, testing of the air transfer grille shall also include the decorative covers as part of
the test specimen. If the decorative cover will be installed non symmetrically, a test of the decorative
cover inside and outside the fire shall be required.
7.2 Supporting constructions
7.2.1 General
The standard supporting constructions given in EN 1363-1 apply.
The supporting construction chosen for the test may be a non-standard support construction. However,
the result is then only applicable to this non-standard support construction.
7.2.2 Walls
For air transfer grills intended to be installed in walls, the following supporting constructions described
in EN 1363-1 apply:
— High density rigid construction;
— Low density rigid construction;
— Flexible construction;
— Non-standard supporting construction.
oSIST prEN 1364-5:2025
prEN 1364-5:2025 (E)
7.2.3 Floors
For air transfer grilles intended to be installed in floors, the following supporting constructions described
in EN 1363-1 apply:
— High density rigid construction;
— Low density rigid construction;
— Non-standard supporting construction.
NOTE Suspended ceilings described in EN 1364-2, are non-standard supporting constructions.
8 Conditioning
The test construction shall be conditioned in accordance with EN 1363-1.
9 Application of instrumentation
9.1 Thermocouples
9.1.1 Furnace thermocouples (plate thermometers)
Plate thermometers shall be provided in accordance with EN 1363-1. There shall be at least one for every
1,5 m of the exposed surface area of the test construction. Plate thermometers shall be oriented so that
side 'A' faces the back wall of the furnace for vertical test constructions and shall be oriented so that side
'A' faces the floor of the furnace for horizontal test constructions.
At the commencement of the test the furnace shall include minimum 3 thermometers irrespective of the
size of the test construction.
9.1.2 Unexposed surface thermocouples
9.1.2.1 General
Several thermocouples shall be placed in order to determine the insulation criteria of the specimen. It is
specified in EN 1364-1 that no thermocouples are positioned on discrete areas of less than 0,1 m . For air
transfer grilles this would imply that grilles could be classified (I) without having any thermocouples
positioned. Additional thermocouples are therefore required for this document as described in the
following. This implies that all rules regarding thermocouple positioning according to EN 1363-1 and
EN 1364-1 are followed but with additional thermocouples as detailed in 9.1.2.2 in this document.
Unexposed surface temperature measurements shall be made using thermocouples in accordance with
EN 13
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