SIST EN 15423:2008

SLOVENSKI STANDARD
01-september-2008
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Ventilation for buildings - Fire precautions for air distribution systems in buildings
Lüftung von Gebäuden - Brandschutz von Lüftungsanlagen in Gebäuden
Systemes de ventilation des bâtiments - Sécurité incendie pour les systemes de
distribution d'air dans les bâtiments
Ta slovenski standard je istoveten z: EN 15423:2008
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 15423
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 13.220.50; 91.140.30
English Version
Ventilation for buildings - Fire precautions for air distribution
systems in buildings
Systèmes de ventilation des bâtiments - Sécurité incendie Lüftung von Gebäuden - Brandschutz von Lüftungsanlagen
pour les systèmes de distribution d'air dans les bâtiments in Gebäuden
This European Standard was approved by CEN on 11 March 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15423:2008: E
worldwide for CEN national Members.

Contents
Foreword.3
1 Scope .4
2 Normative references .5
3 Terms and definitions .6
4 Air distribution system.7
4.1 General requirements.7
4.2 Design of air distribution systems.7
4.3 Installation .7
5 Requirements for components intended for fire precautions .7
5.1 General.7
5.2 Inlet/outlet louvres.8
5.3 Fans.8
5.4 Air control dampers.10
5.5 Duct .11
5.6 Fire dampers and smoke control dampers .11
5.7 Air terminal devices.12
5.8 Anchors and supports .13
5.9 Duct fittings.13
5.10 Control panels.13
5.11 Cables and connections .14
5.12 Air handling units .14
5.13 Air filters .15
5.14 Sound attenuators .16
5.15 Heat exchangers .16
6 Commissioning and maintenance of air distribution systems .16
7 Marking, labelling and product information.17
Annex A (informative) Checklist for components .18
Annex B (informative) Table of components/characteristics European Standards .20
Annex C (informative) Maintenance for fire dampers and smoke control dampers.22
Bibliography .24

Foreword
This document (EN 15423:2008) has been prepared by 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 November 2008, and conflicting national standards shall be withdrawn
at the latest by November 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This document gives guidance for system designers, installers, commissioners and maintenance teams on the
incorporation of protective measures for air distribution systems including dual purpose systems for smoke
and heat exhaust systems within buildings, to prevent the initiation and the spread of fire, smoke and other by-
products of combustion.
This document intends to only support any national (building) regulations, which are the basis of any design of
a building or parts of it. It is up to the designer to enquire about the suitability (in particular in legal terms) of a
specific solution given in this document (e.g. although “dual purpose systems” are covered in this document,
they may not be permitted in some Member States or only in certain types of buildings).
This document applies to all air distribution systems including dual purpose systems (except systems only
dedicated to smoke exhaust systems, which are dealt in other European standards) including technical rooms
or spaces for the installation of devices to assist in ventilation of a building (e.g. distance of storage of
combustible materials to devices and not the fire resistance of the building structure), penetrations, and
following components/products used in the system like:
 inlet/outlet louvres;
 fans not exposed / exposed to the smoke;
 air control dampers;
 ducts;
 fire control dampers;
 air terminal devices;
 anchors and supports;
 duct fittings;
 control panels;
 cables and connections;
 air handling units;
 air filters;
 sound attenuators;
 heat exchangers.
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.
EN 1364-2, Fire resistance test for non loadbearing elements - Part 2: Ceilings
EN 1366-1, Fire resistance tests for service installations - Part 1: Ducts
EN 1366-2, Fire resistance tests for service installations - Part 2: Fire dampers
EN 1366-8, Fire resistance tests for service installations - Part 8: Smoke extraction ducts
EN 1366-9, Fire resistance tests for service installations - Part 9: Single compartment smoke extraction ducts
prEN 1366-10, Fire resistance tests for service installations - Part 10: Smoke control dampers
EN 1505, Ventilation for buildings - Sheet metal air ducts and fittings with rectangular cross section -
Dimensions
EN 1506, Ventilation for buildings - Sheet metal air ducts and fittings with circular cross section - Dimensions
EN 1507, Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength
and leakage
EN 12101-3, Smoke and heat control systems - Part 3: Specification for powered smoke and heat exhaust
ventilators
prEN 12101-8, Smoke and heat control systems - Part 8: Specification for smoke control dampers
prEN 12101-9, Smoke and heat control systems - Part 9: Control panels
EN 12097, Ventilation for buildings - Ductwork - Requirements for ductwork components to facilitate
maintenance of ductwork systems
EN 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols
EN 13053, Ventilation for buildings - Air handling units - Rating and performance for units, components and
sections
EN 13403, Ventilation for buildings - Non-metallic ducts - Ductwork made from insulation ductboards
EN 13501-1, Fire classification of construction products and building elements - Part 1: Classification using
data from reaction to fire tests
EN 13501-3, Fire classification of construction products and building elements - Part 3: Classification using
data from fire resistance tests on products and elements used in building service installations: fire resisting
ducts and fire dampers
EN 13501-4, Fire classification of construction products and building elements - Part 4: Classification using
data from fire resistance tests on components of smoke control systems
EN 13964, Suspended ceilings - Requirements and tests methods
EN 1886:2007 Ventilation for buildings - Air handling units - Mechanical performance
EN 13779, Ventilation for non-residential buildings - Performance requirements for ventilation and room-
conditioning systems
EN 12237, Ventilation for buildings - Ductworks - Strength and leakage of circular sheet metal ducts
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 12792:2003, together with
the following apply.
3.1
shaft
space generally encased with building elements, where ventilation ducts and possibly other pipes and cables
are located
3.2
support
device for a system component, e.g. fire damper, silencer, etc. to bear a load
3.3
inlet/outlet louvre
device, consisting of an assembly of parallel sloping vanes, intended to permit the passage of air, while
providing a measure of protection against environmental influences
[EN 12792:2003, Table 1, number 242]
3.4
air control damper
element inserted into an air distribution system or element of an air distribution system permitting modification
of the air resistance of the system, and consequently changing the air flow rate (dampers), or shutting off the
air flow completely (valves), or controlling the air flow rate and in addition providing shut-off of the air flow
(control valves)
[EN 12792:2003, Table 1, number 95]
3.5
fire damper
mobile closure within a duct, which is designed to prevent the passage of fire
[EN 1366-2]
3.6
smoke control damper
device automatically or manually activated which may be open or closed in its operational position, to control
the flow of smoke and hot gases into, from or within a duct
[prEN 1366-10]
3.8
air terminal devices
component of a ventilation installation which is designed with the purpose of achieving the predetermined
movement of air into or from a treated space
[EN 12792:2003, Table 1, number 31]
3.9
air transfer devices
air terminal device designed to allow the transfer of air from one space/room to another space/room
[EN 12792:2003, Table 1, number 36]
3.10
local requirement
legal requirement to comply with, from a regulation implemented in a country
NOTE Local requirement could deal with characteristics of products, installation, commissioning, maintenance…
Most of the time, these requirements come from Fire Safety Regulations.
3.11
control equipment
any initiating device for a smoke and heat control system component e.g. control panel, basic control panel,
mechanical control panel
3.12
control panel
multi-operation initiating device for a smoke and heat control system
4 Air distribution system
4.1 General requirements
Components in the air distribution system shall be made or installed in such a way that they will not increase
the hazard of spreading fire and smoke gases in the case of fire. The materials used in buildings, air
distribution systems and their components shall not contribute to the development of fire in accordance with
any local requirement.
If there are local requirements on the reaction to fire of materials and/or resistance to fire, they shall be
observed.
4.2 Design of air distribution systems
Air distribution systems shall be turned off in case of fire, unless local requirements allow for other procedures.
4.3 Installation
Use the manufacturer's instructions for all components.
The sealings through fire resistance enclosures (e.g. ceiling or walls), shall be in accordance with local
requirements.
5 Requirements for components intended for fire precautions
5.1 General
The performance, which will be achieved by the product in end-use conditions, shall reflect the results of
product fire resistance, fire reaction and smoke control testing, when required, and in accordance with the
local regulations, if any. A product shall be tested as a complete assembly with all necessary components
which affect fire resistance performance as described in the product standard.
Optional accessories can be available for a product.
Two types of accessories can be provided:
 fire tested accessory,
 non fire tested accessory; these need to be studied and calculated inside the complete design of the
complete ventilation system.
When accessories, modifications, coatings etc. affect fire resistance performance, the product shall be tested
both with and without these (for example: with and without painting) and conform to relevant standards.
NOTE When accessories do not affect fire resistance performance, they can be supplied and fitted on site.
Annex B presents relevant standards for each component and their characteristics.
5.2 Inlet/outlet louvres
5.2.1 Component
If the louvres are on the external wall of the building no special requirement is needed.
5.2.2 Installation
Location of inlet and outlet louvres shall be in accordance with EN 13779.
5.2.3 Commissioning
Conformity with the installation design shall be checked, in particular the minimum distance, defined according
to 5.2.2, between the inlet and outlet louvres.
5.2.4 Maintenance – Routine
A visual check of the louvres shall be performed during ductwork maintenance operations. The air intake or
discharge cross-section shall be free from foreign items such as rubbish, birds or insects etc.
5.3 Fans
5.3.1 Fans for ventilation only
5.3.1.1 Component
As a fire precaution the fan electric motor shall be equipped with internal or external thermal overload
protection. Depending on the application, it may be used to switch off the motor or to warn of a thermal
overload.
If necessary fans should be protected, and when they are not connected to a duct they should be protected
with metal screens, grids or similar to prevent the entrance of paper, rubbish, and similar foreign material.
For fans in air handling units, see also 5.12.
5.3.1.2 Installation
Fans shall be located, arranged and installed to afford access for commissioning and maintenance.
Fans shall be installed in accordance with the relevant standards and the manufacturer's instructions.
In order to reduce the propagation of fire initiated by the fan, a free area (area that has no contact with any
part of the fan) should be allowed around installed fans and motors. If there is no free area, all materials
should be fire rated according to national regulations.
The fan shall be stopped in case of fire either manually or automatically depending on the system design.
5.3.1.3 Commissioning
See Clause 6.
Make sure, by turning on the fan, it is running properly.
Check that the rated intensity does not exceed the nominal value indicated on the product nameplate.
5.3.1.4 Maintenance – Routine
See Clause 6.
In addition, the free area shall be checked visually. The electrical motor shall be checked in accordance with
the manufacturer's instructions and the alignment of the fan belt drives shall be controlled.
5.3.2 Fans for ventilation and air supply in smoke exhaust system
5.3.2.1 Component
As a fire precaution, the fan electric motor shall be equipped with internal or external thermal overload
protection. Depending on the application, it may be used to switch off the motor or to warn of a thermal
overload.
If necessary, fans should be protected and when they are not connected to a duct they should be protected
with metal screens, grids or similar to prevent the entrance of paper, rubbish, and similar foreign material.
5.3.2.2 Installation
Fans shall be located, arranged and installed to afford access for commissioning and maintenance.
Fans shall be installed in accordance with the manufacturer's instructions.
In order to reduce the propagation of fire initiated by the fan, a free area (area with no contact with any part of
the fan) should be provided around installed fans and motors. If there is no free area, all materials should be
fire rated according to national regulations.
The air distribution system shall ensure that the fan operates in accordance with the specific requirements of
the intended application and particularly the fan shall continue to run in case of smoke.
5.3.2.3 Commissioning
See Clause 6.
Make sure, by turning on the fan, it is running properly.
Check that the electrical intensity does not exceed the nominal value indicated on the product nameplate
5.3.2.4 Maintenance – Routine
See Clause 6.
5.3.3 Fans for ventilation and smoke control (dual purpose)
5.3.3.1 Component
The fan shall be tested according to EN 12101-3 and classified in accordance to EN 13501-4.
5.3.3.2 Installation
In case of fire, the control system shall give priority to the safety function of the fan.
If the fan is used for ventilation and assistance in case of fire, the following applies:
 fan shall continue to run in case of fire;
 air distribution system shall ensure that the fan operates in accordance with the specific requirements
of the intended application.
5.3.3.3 Commissioning
See Clause 6.
Make sure, by turning on the fan, it is running properly.
Check that the electrical intensity does not exceed the nominal value indicated on the product name plate.
When a specific sequencing of response is specified (cascade starting of fans, fan delays to allow opening of
the dampers, etc), these sequences shall be tested.
5.3.3.4 Maintenance – Routine
See Clause 6.
5.4 Air control dampers
5.4.1 General
This clause applies to flow control dampers only.
For other dampers, see 5.6.
5.4.2 Component
When the air to be extracted contains corrosive gases in quantities harmful in respect of duct durability, the air
control dampers shall be made of building materials which can withstand these conditions.
5.4.3 Installation
Air control dampers shall be installed in a way their position can be seen.
5.4.4 Commissioning
Dampers position shall be checked and a complete open-close test shall begin.
5.4.5 Maintenance – Routine
Dampers position shall be checked.
See EN 12097.
5.5 Duct
5.5.1 Component
Materials for walls in ventilation ducts shall be selected so that the ducts can withstand the functions they are
exposed to, such as heat and cleaning.
The duct used for ventilation only, when required by local requirements, shall fulfil EN 12237, EN 13501-1,
EN 13501-3, EN 1366-1,
...